乱伦电影-乱伦电影网-乱伦合集-乱伦家庭-乱伦聚合-乱伦快播电影-乱伦理电影-乱伦妈妈-乱伦母子-乱伦熟女

Position:
Homepage
/
/
/
A picture that calms down the Chinese elite!

A picture that calms down the Chinese elite!

  • Categories:Company news
  • Author:
  • Origin:
  • Time of issue:2018-04-23
  • Views:

(Summary description)This radar map of the technological gap between China and the United States released by McKinsey is worth collecting.

A picture that calms down the Chinese elite!

(Summary description)This radar map of the technological gap between China and the United States released by McKinsey is worth collecting.

  • Categories:Company news
  • Author:
  • Origin:
  • Time of issue:2018-04-23
  • Views:
Information

After ZTE has just extinguished and attacked Huawei, Trump’s trump card is this picture! The big danger is the big opportunity!

xq

This radar map of the technological gap between China and the United States released by McKinsey is worth collecting.

This is a picture that can calm the Chinese elite! The trade war is a comprehensive multi-round game based on strength. Only by knowing the enemy can the chance of winning be increased.

This precise blow to ZTE has a strong deterrent effect, and now it is administratively summoned to Huawei. Trump has gained a lot of negotiating weight in this round!

Although we have already seen that Trump’s trump card is absolutely impossible for a full-scale trade war, one is because businessmen will not do a lose-lose thing, and the other is that the U.S. system makes him unable to bear the consequences of a real fight: the domestic result is inevitable. It was him who stepped down. In this regard, China's system is much more capable of resisting shocks and withstanding difficulties. The big danger is the big opportunity!

The country can take the pains of the trade war, concentrate N times the number of people and property, introduce more powerful policies, vigorously develop high-tech industries and chips and other high-tech technologies, deepen internal reforms and multiply the scale and quality of the private economy, which will waste real estate and Huge funds in low-energy, low-efficiency and surplus areas such as mixed reforms have been directed to these key areas that determine China's future competitiveness! We have to "thank" Trump for intensifying foreign aggression and accelerating the consensus on deepening China's internal reforms!

Trade wars mainly take place in these fully competitive fields, and private enterprises are the main force in fully competitive industries! This round of China's deepening reforms catalyzed by the trade war will once again release and stimulate the scientific and technological vitality of the private economy, and China will undergo major changes. The strong historical process will be realized at double speed.

01. Now the trade war is being loaded with bullets. Only when the trigger is pulled, everyone is murmuring. What is Trump doing?

Solve the trade deficit, boost employment, and build momentum for the mid-term elections? Adhere to China's non-market economy and maintain the operation of the international trading system?

This is no longer a simple trade imbalance issue. It seems that it has evolved into an industrial competition between the two big powers, which is a comprehensive containment of the rising power of the emerging big power by the preserving power.

02. The U.S. media is highly vigilant about China's technological rise, and China's WeChat self-media has the accusation that "the U.S. is scared to pee".

As early as February this year, Stratfor, a well-known geopolitical think tank in the United States, released "The Coming Tech War against China". The report praised China’s remarkable achievements in the fields of hypersonic missiles, human gene editing technology and quantum satellites in recent years. A faint sense of pride swelled in the chest. It also constantly questioned whether American technology companies could catch up with their Chinese counterparts. Breakthroughs in the field of artificial intelligence:

Artificial intelligence will bring a complete revolution to the military and people's livelihood, and China is pressing the United States step by step in this regard. The three-year artificial intelligence plan issued by the Ministry of Industry and Information Technology at the end of 2017 revealed China's ambition to achieve self-sufficiency in the core technology field. The Chinese government even formed a "dream team" with private technology giants.

xq

(Comparison of R&D expenditure between China and the United States, please note that the unit is 1 billion U.S. dollars)

xq

In the week before China and the United States were tit-for-tat, the British "The Economist" used the cover report "Sino-US Technological Hegemony" to join in the excitement, saying that "the witty I have already seen everything":

"Designed in California, Made in China", the words behind Apple's mobile phone once represented the division of labor between the world's two largest economies. Now that the battle is changing, the technological threat China poses to the United States has caused the United States to panic. Will the Sino-U.S. technological hegemony trigger a trade war?

The New York Times used more harsh words. The Sino-U.S. trade war will accelerate the world’s most advanced industries into the new Cold War era, which is colder than the U.S.-Soviet Cold War, and more difficult to solve than the U.S.-Japan trade war:

In the past, Japan was a competitor in technology, but an ally in the military. The Soviet Union is an adversary in defense technology, but it is far inferior in business... But China has strong scientific and technological strength and funds when competing for cutting-edge fields such as artificial intelligence, quantum computing, and the next generation of wireless Internet.

xq

Obviously, Western media don't think this is a trade war between soybeans and sorghum, one steel and one aluminum. The United States is very afraid of China's achievements in top-notch technology in recent years, and it is enough to launch a battle for technological hegemony for this.

Is it really so powerful for my country? In the past few years, China has been so strong that it has overwhelmed the United States in high-tech fields?

High-energy warning, below you will see that Americans have a serious lack of awareness of their own national conditions!

03. How did the United States reach its peak in the field of top science and technology, and how outrageous it is.

(1) The U.S. can constrain China's manufacturing with a single engine

Why is China's first domestically produced large aircraft C919 only equivalent to the Boeing 737 of the United States 50 years ago?

Why is China’s current helicopter with the best plateau performance being the American "Black Hawk" purchased from the United States in the 1980s?

Why is there a gap of about 10 between the Chinese fighter jet fighter J-20 and the U.S. F-22?

The most important thing is the "heart" problem. Marking a country's most sophisticated, powerful, and most intensive field of science and technology, it is undoubtedly the aviation industry known as the "modern industrial crown", and the jewel in the crown is the aviation engine. However, China has exhausted its efforts for more than half a century and has yet to create a mature and reliable core machine.

The top technologies currently mastered by the United States are: mature civil turbofan engines with large bypass ratio, fourth-generation military low-bypass ratio high-thrust turbofan engines, fifth-generation military non-geometric structure conversion variable-circulation turbofan engines, military/civilian High-power turboshaft/turboprop engine......

Because of the two F119 engines with afterburning thrust of 156 kN, the American fighter F-22 can make many incredible maneuvers. It is also the only fighter in the world that can cruise at supersonic speed without afterburner. It is the hegemony of the U.S. military. Vital.

Because of the four TF39 turbofan engines with a thrust of 191 kN each, the US C-5 Galaxy dare to say loudly that it is the world's strongest transport aircraft, none of which is currently in service. The upper cabin can carry 75 passengers. Under full load, it can take off within a distance of 2,300 meters and land within a distance of 1,493 meters. The load capacity of the fuselage can be estimated as: 100 Volkswagen Beetles/6 Greyhound buses/6 Apache helicopters/2 M1A2 main battle tanks/1 C-130. Development began in 1961 and entered service in 1970.

Aeroengines need to work under severe conditions of high temperature, high pressure, high speed and high load, and meet the requirements of large thrust/power, light weight, high reliability, good safety, long life, low fuel consumption, low noise, low pollution, etc. Very demanding and conflicting requirements.

Therefore, it also involves countless disciplines such as materials science, aerodynamics, thermodynamics, and structural mechanics. It is one of the most complex and multi-disciplinary integrated engineering machinery systems in the world today. The shortcomings of any discipline will lead to the limitation of the level of aeroengines. It is no exaggeration to say that the level of aeroengine is the level of a country's basic science and manufacturing industry, of course, plus the ability to burn money.

This is why, as a "counterfeit country", after so many years of research, it has yet to come up with a mass-produced engine that represents China's high-end manufacturing. It is impossible to make a breakthrough in this high-precision field. Naturally, he can understand why Han Han, who has been a racing driver, complains that China cannot provide a decent car engine.

(2) U.S. unique giant astronomical telescope dominates the optical field

The high-quality digital cameras Nikon and Canon in daily life are all from Japan, but in fact, when the United States launched the Hubble Telescope (carrying a 2.4-meter-diameter giant lens), Japan could not process the same type of equipment at the 0.5-meter level.

The United States is the world's high-end optical power, and only the United States can process super-large-diameter optical lenses.

Let you see what is the real "journey is the sea of ??stars": Recently, NASA said that the Webb telescope, called "the most powerful telescope in history," originally scheduled to enter service this year, will be postponed to 2020 in order to allow engineers to have more More time to ensure the success of the task.

This giant telescope has an aperture three times that of the Hubble Space Telescope, and is about 100 times more sensitive than Hubble, yet its mass is only half that of Hubble. Its main task is to investigate residual infrared evidence as the Big Bang theory. After deployment, it will allow astronomers an unprecedented glimpse of the first galaxies formed at the beginning of the universe.

While the United States is developing a 100-meter-diameter super thin-film lens equipment, China is still working on a 4-meter-diameter large-scale giant lens equipment, and the technological gap is naked.

Even worse, the giant lens equipment system is the core key equipment of military optical reconnaissance satellites and reconnaissance systems.

Today’s best optical imaging reconnaissance satellite is the American Keyhole-12 (KH-12), with a ground resolution of 0.1-0.3 meters, which can count tanks, tents, and personnel in the desert.

The U.S. civilian remote sensing satellites are not bad either, shooting 0.35-meter satellite photos of Pudong New Area in Shanghai

The two high-end technologies of engines and optics largely determine how far a country's aerospace technology can go. China has indeed made many breakthroughs in the past ten years, but the gap with the United States is still huge.

In addition, the United States has made no breakthroughs in the design and manufacture of heavy/super-heavy rockets, space station technology, lunar exploration technology, and deep space exploration technology.

xq

(3) New materials that disrupt the industry

Using the right new materials in key components is likely to achieve a subversion of the entire industry. In addition to the new heat-resistant materials on the engine fan, how good is the use of new materials in the United States?

Let me talk about the "confidential" level first.

The American B-2 ghost, which is full of science fiction and once made the world tremble, is the only stealth strategic bomber in the world, each costing 2.4 billion U.S. dollars. Most of the surface of B-2 is covered by a layer of special elastic material to maintain uniform conductivity on the surface to reduce the reflection of radar waves from joints or joints. In the design, the parts that cannot rely on the shape for stealth (such as the air intake) must be coated with radar absorbing material (RAM), and its composition is still highly classified. It was developed in the mid-1970s and entered service in 1997.

Another masterpiece of alien appearance, the reconnaissance aircraft SR-71, the Blackbird, which has not been shot down by any enemy aircraft or anti-control missiles in the actual combat record, is still the fastest manned aircraft in the world. Blackbird’s technological breakthrough lies in the thermal barrier. Above three times the speed of sound is the thermal barrier area. The maximum speed of the Blackbird is Mach 3.35. At this speed, aviation aluminum will become brittle and soft, so the blackbird uses low weight and high strength. Titanium alloys and composite materials are the real technological key.

Let's take a look at the more "grounded":

A. Lithium-air batteries are expected to disrupt the electric vehicle industry

The US Tesla Model S has a maximum cruising range of 540 kilometers and uses a "ternary lithium" battery, which is the longest range of all electric vehicles.

But recently another news came from the United States that they have created lithium-air batteries, which greatly inspires the field of electrochemical energy storage.

This battery with extremely high theoretical energy density has been successfully charged and discharged 700 times, breaking the previous limitation that lithium-air batteries can only use pure oxygen and have a short cycle life. It is expected to replace the most successful rechargeable battery lithium-ion battery so far. The bottleneck of electric vehicle mileage.

B. Semiconductor overlord who cannot be easily challenged

"Semiconductor King" Intel announced that it will launch several 3D XPoint memories this year, with a maximum capacity of 512G. The industry exclaimed that this is a revolution in the PC field.

Tsinghua Unigroup expects to launch DDR4 memory modules this year, with a maximum capacity of 128GB. At present, it is still stuck in the third-generation technology DDR3, with a single maximum capacity of 64GB.

Semiconductor materials are widely distributed from mobile phone chips to cruise missile controllers, from civilian to military, and are the core technology of the electronic information industry. US semiconductor production has accounted for 48% of the global market for many years, and Intel’s research and development expenditure alone has reached four times that of the entire Chinese chip industry.

According to the statistics of the American Semiconductor Industry Association (SIA), the annual semiconductor sales of the entire Chinese market is about 100 billion U.S. dollars (China's self-sufficiency rate is less than 10%), of which the market share of American companies is close to 60%, and the amount of US companies exported to China is at least Above 50 billion U.S. dollars.

However, the United States has never relaxed its "blockade war" against China in the semiconductor field.

During the Cold War, Europe, America, Japan and other countries organized a Paris Coordinating Committee (Batumi for short) to restrict foreign technology exports. After the Cold War, Batumi was dissolved. However, the United States immediately established the Wassenaar Agreement with many countries to continue to restrict the export of foreign technology, especially high-tech technology, and semiconductor technology is the focus of it. Therefore, according to US export regulations, 14nm chip manufacturing can be moved to China, but Intel’s X86 CPU design and other key technology designs must not leave the United States.

In recent years, China has invested tens of billions of dollars in the semiconductor industry, China’s Made in China 2025 requires self-sufficiency in chip manufacturing, and Tsinghua Unigroup and HiSilicon are among the top ten global semiconductor companies. The United States has become more strict with Chinese semiconductors. .

In this Sino-US trade war negotiation, Trump's request is very clear, hoping that China will continue to increase imports of US semiconductor chips.

At the same time, in recent years, the U.S. authorities have used "national security" as an excuse for several acquisitions initiated by Chinese companies to acquire U.S. semiconductor companies:

In December 2015, Tsinghua Unigroup acquired US chip storage giant Micron for US$23 billion;

In February 2016, Huachuang Investment and China Resources led the acquisition of Fairchild Semiconductor in the United States for US$2.6 billion;

In September 2017, Canyon bridge, a private equity firm with a Chinese background, acquired Lattice, a US chip company, for US$1.3 billion;

...

In February 2018, Hubei Xinyan, a Chinese semiconductor investment fund, purchased US semiconductor test equipment manufacturer Xcerra for US$580 million;

In March 2018, a Singapore Broadcom acquisition of Qualcomm was rejected because Qualcomm was one of the few wireless chip companies that made long-term investments, and the other was Huawei. Trump is worried that after Qualcomm is acquired, Huawei will replace it as the leader of 5G wireless standards.

(4) Profitable but beneficial biopharmaceuticals

The absolute leader in the field of American biopharmaceuticals, the number of biopharmaceutical companies ranks first in the world, and Wall Street capital is also crazy about biopharmaceuticals. In 2017, there were 11 American companies in the TOP25 global IPOs of biopharmaceutical companies.

Such as tumor drugs. According to Professor Yu Dechao of the Chinese Academy of Sciences, the United States has approved 48 new drugs in the past few years. Basically, there are 1-5 new drugs on the market for every tumor. For example, five years ago, doctors had only three medicines for lung cancer. Today, doctors can choose more than a dozen medicines for lung cancer. The incidence and mortality of tumors in the United States have plummeted. Today, the five-year survival rate for cancer in the United States is 70%, while China is less than 30%.

Such as vaccines. The United States is currently basically a polysaccharide vaccine with no live bacteria and strict requirements. Phenolic fungicides cannot be used. It has even begun to market protein-binding vaccines with stronger targeting and immunity.

The main force of domestic vaccines in China is still live bacteria, attenuated vaccines such as BCG vaccines in the early 20th century. How much toxicity is reduced is the real safety, and there is no absolute indicator at all.

China's high-end drugs are basically imported from European and American countries. Speaking of this, I have to mention medical equipment and medical consumables. The market is almost dominated by foreign brands. Among them, General Electric has properly established the market in nuclear medicine, ultrasound imaging, magnetic resonance MRI, and CT.

(5) Artificial intelligence

This top technology that was considered by Robert Walker, the former Deputy Secretary of Defense of the United States, will change the nature of future wars and the form of conflict, and the United States also maintains its leading edge.

The familiar human-computer interaction function Siri on Apple mobile phones is a CALO project invested by DARPA in 2003 by the Advanced Research Projects Agency of the US Department of Defense, and this project can also be traced back to Stanford University’s artificial intelligence research in the 1960s.

Alpha Go developed by Google is the first artificial intelligence program to defeat human professional Go players and the first world champion of Go.

In the past year, Google’s Waymo has reached 350,000 miles of autonomous driving in California, and the number of times it has left the autonomous driving mode and taken over by the driver is only 63 times.

In addition to what the United States owns, through capital and laws, there are more top technologies that the United States can control beyond imagination.

For example, the Chinese Wuzhi 10 engine used a Canadian civilian model during the test flight. This model was better than China's best military products at the time, but the United States said no, and Canada did not dare to sell it again. As a result, China Wuzhi 10 had to be redesigned at the last minute.

Such as civilian computer systems, databases. China's large state-owned state-owned enterprises still have to purchase systems from Microsoft and purchase data management services from Oracle.

This radar map of the technological gap between China and the United States released by McKinsey in 2013 is still outdated. It will take at least 20 years for China to catch up with the current technological achievements of the United States.

When the economic gap is getting smaller and smaller, China should pay more attention to whether the technological gap can keep narrowing at a corresponding speed.

Although the West has been focusing on the scientific and research progress that China has made in recent years:

China was the first to develop a high-performance quantum radar in the world, China was the first to design a quantum computer, China was the first to develop a quantum communication satellite, and China was the first to complete an anti-communication quantum experiment. The first breakthrough in all-electric propulsion technology was China, the first breakthrough in four-wing tiltrotor technology was China, the first independent space station was built in China, and the first to achieve continuous mining of combustible ice was China...

China does have confidence in Made in China 2025, but we must also see the real gap. Behind the technological gap between China and the United States is not only the competition between major powers in scientific and technological research and development, but also the hard work of several generations of research, persistence in innovation, and respect and protection of intellectual property rights.

04. The cruel reality of China's manufacturing industry: a small foreign company can paralyze China's trillion-level industry

This is a good article with an in-depth analysis of the domestic manufacturing industry. It explains the core issues and some key issues in the process of China’s industrialization, involving technology, talents, systems, policies, and many other fields. It also points to the weaknesses and weaknesses of China’s industrialization. The pain point, in this impetuous society, it is not easy to solve these problems. The author also proposes solutions and methods.

The "hidden champion" of the industry refers to a little-known small and medium-sized enterprise that is absolutely leading in a certain market segment and has become the world's top three in its own field. Most of the "invisible champions" are located in the upper reaches of the industrial chain, because they do not have direct contact with end consumers, and their public awareness is relatively low, hence the name "invisible".

However, because of mastering the industry's core technology, key components or key materials, it enjoys an irreplaceable position and is the real behind-the-scenes controller of the industry. It is said that there are more than 3,000 hidden champion companies in the world, and Germany has 1,307, the largest number. Although China is the world’s largest manufacturing country and the world’s second largest economy, many industries are also among the world’s largest in scale, but these industries are often large. It is not strong. The fundamental reason lies in its core technology. Most of the key components and materials are monopolized in the hands of foreign "hidden champion" companies. Please add WeChat public account: industrial intelligence (robotinfo) Jack Ma is paying attention

Therefore, if China's industry is to grow stronger and have the right to speak, more "hidden champion" companies are needed to focus on solving the industry's key technologies, core components and special materials, and provide professional and high-quality products and services.

As we all know, although my country's integrated circuit industry has developed by leaps and bounds in recent years, the problem of "core shortage" with a high degree of external dependence has always been the biggest pain point: core technology is controlled by others, and key components and materials have long been monopolized by foreign companies. 90% of domestic chips rely on imports, which exceeded US$220 billion in 2016. Many industries in China are like the electronics industry. Because of the lack of "core", they are large but have no right to speak. For example:

China's steel production is the largest in the world, but a large amount of special steel needs to rely on imports;

China's high-speed rail is China's business card, but the core power system and control system must come from foreign companies such as Siemens and ABB, and even the screws are dependent on imports;

China's production of ballpoint pens is the largest in the world, but it cannot produce ballpoint pen cores;

China's PC production is the first, but computer chips are basically monopolized by Intel and AMD in the United States;

The Chinese auto market ranks among the best in the world, but the engine has always been constrained by others.

Looking at the development of China’s industry, although the scale is large, due to the lack of a “core” such a fatal shortcoming, the industry is always at a disadvantage of “passive beating”, while developed countries control core technologies and key materials or key components. Firmly control the industry initiative.

I saw a news some time ago that BOE burned hundreds of billions of yuan and became the world's largest manufacturer of flat panel displays. The shipment volume of smartphone LCD displays and tablet computer displays ranks first in the world, and LCD TV displays. Third in the world, it has changed the situation that China imports hundreds of billions of yuan worth of LCD screens every year.

To be honest, I am very impressed after seeing this news. On the one hand, it can be seen that China has indeed undergone earth-shaking changes since the reform and opening up. Many industries have gone from blank to the largest in the world just like the flat panel industry, solving a large number of employment problems and increasing China's GDP. The country has also developed from "one poor and two white" to the world's second largest economy;

On the other hand, it has aroused long-term worries and worries about China's industrial development being large but not strong, focusing on output value while neglecting research and development, focusing on scale and ignoring core technologies! At present, many core technologies, key materials and components of China’s industries have been Companies in developed countries such as Europe, America and Japan are monopolized. Most of these monopolies are hidden champions of the industry. They are the only or very few companies in the world that can achieve the ultimate in essential and irreplaceable key components and materials for modern high-end industries. As large as precision machine tools, semiconductor processing equipment, aircraft engines, as small as ball-point pen cores, high-speed rail screws, chips in the electronics industry, spacer microspheres for liquid crystal displays, conductive gold balls for microelectronic links, and analysis and testing Chromatographic column packing, separation and purification chromatographic media for biopharmaceuticals, etc.

It can be said that if a small invisible champion foreign company does not supply relevant materials, it can paralyze China's trillion-level industry. This is not alarmist, but the cruel reality we face.

Therefore, as long as the irreplaceable key components and materials are in the hands of invisible champions abroad, no matter how large China's industry is, it will not be able to get rid of the passive situation of "assembly factories and low-end operation". At present, China should dominate any strategic industry, promote the national economy to move toward the high-end of the global value chain, realize industrial transformation and upgrading, and enhance economic innovation and competitiveness. It is not relying on the downstream giant assembly and processing plants that invest more. Instead, it is necessary to cultivate more upstream invisible champion companies with independent core technologies, key materials and components, so as to have core competitiveness in major industries, in order to break through the bottleneck of China's economic development.

The invisible champion will become the decisive point and key for China to move from a manufacturing power to a manufacturing power.

Analysis on the Resource Advantages of China's Rapid Industrial Expansion

In recent years, China has gradually become the world's manufacturing center, and the scale of many manufacturing fields has leapt to the first place in the world. This is due to the four unique resource advantages of China:

One is market advantage. China is a large country with the largest population in the world, with huge purchasing power, and with economic development and wealth accumulation, the market potential is increasing. The huge consumer demand has enabled Chinese companies to develop rapidly, and it is very easy to form large-scale industries. At present, many markets in China have become the world's first in demand, such as steel, plastics, food, electronic devices, etc.;

The second is labor advantage. China has a large population and can provide abundant labor resources for industrial development. Therefore, labor-intensive light industries such as clothing, textiles, toys, leather, etc. and downstream assembly industries such as flat panel displays have absolute development advantages in China;

The third is capital advantage. Since China's reform and opening up, the country has accumulated a large amount of wealth and capital, which can provide strong financial support for industrial development;

The fourth is the advantage of the system. China is a centralized country. Under the conditions of a socialist market economy with Chinese characteristics, the country can concentrate all kinds of resources and forces to do major tasks. In order to enhance the competitive advantage of strategic industries, relevant preferential policies can be introduced at the national level, and even huge investment in support regardless of cost.

Whether it’s the BOE LCD panel we mentioned earlier

The industry, or the high-speed rail that we are proud of, is a good case. With the support of the state, China’s backward LCD flat panel display production technology can be quickly changed, and the annual import of hundreds of billions of LCD screens can be ended. The state strongly supports BOE’s investment. Hundreds of billions of renminbi to build the LCD panel line, even if the company's huge losses for many years can continue, and finally become the world's largest company in LCD panel shipments. Without strong national policies and financial support, and relying entirely on market-oriented operations, BOE will probably not be able to survive, let alone sustainable development.

Similarly, the rapid expansion of China's high-speed rail to become the number one in the world is also due to the strong support of national finance and government resources.

Research on the part-time job mode behind scale

Quite a few industries in China are expanding rapidly in a short period of time, and under the strong background that there is no shortage of market, no shortage of people, no shortage of money, and no shortage of government support, why is there always excess scale and insufficient competitiveness? The main reason is China. The economic development process is short, the technology accumulation is small, and the research and development capabilities are weak. Many core technologies and key materials are monopolized by developed countries.

The ZTE chip incident and the Huawei memory incident clearly exposed the embarrassment and helplessness of the Chinese industry's fragility, vulnerability, and lack of voice. Take the LCD industry as an example. Although China's LCD panel industry is large in scale, it is basically a processing and assembly type. Not only the production line must be imported from Japan, but also many key materials for manufacturing panels must be imported.

Therefore, the seemingly prosperous production is actually made by Japanese equipment and material manufacturers. The Japanese moved LCD panels to China only to use China’s abundant labor, land resources and a large amount of capital. They can easily obtain huge profits from China by relying on the monopoly of key materials and equipment, and then use these profits for development. The new display technology will be upgraded and then sold to China to make more profits. As a result, Chinese companies in the downstream of the industrial chain have been buying, buying, buying, buying from the 5th generation line to the 6th generation line, then to the 7th generation line and 8th generation line, to the current 10th generation line, each line investment has reached tens of billions. .

What’s even more astounding is that these amazingly-invested production lines require key Japanese technology and materials to produce. That is to say, the start of the production line means that China must purchase a large amount of Japanese materials at the same time, and the supply will be cut off every day. Yiyi Investment's production line was immediately paralyzed.

An invisible champion company in Japan that masters key materials can get stuck in the neck of China's trillion-dollar industry. In other words, if the Chinese do not possess the core technology, no matter how large the industry is, it can only be in a passive position at the discretion of others.

So, why doesn’t China rely on the huge scale of the display industry, numerous application talents, and the state’s capital support to develop and innovate its own display production technology and get rid of the passive situation of working for others? It’s not that we don’t want to do it. It is because the development of new display technology often requires the cooperation of upstream material manufacturers. Currently, most of the key upstream materials are monopolized by Japanese hidden champion companies. Even if scientists in China display technology have good technology and ideas, if there is no supply and cooperation from upstream material manufacturers, it is like a clever woman who can’t cook without rice.

This is the grim reality facing China!

If you want to truly take the destiny in your own hands and make Made in China a benign interaction in the entire industry chain, you do not rely on buying more, larger, and more advanced downstream assembly lines. Although relying on the purchase of assembly lines can increase employment, To rapidly expand GDP, we must be determined to start from the source, guide and support companies to focus on the R&D and manufacturing of core technologies and key materials, focus on the ultimate in core components and upstream products, and focus on becoming an invisible champion company in market segments , To break through the bottleneck of key materials and core component manufacturing to break the encirclement of foreign companies, and provide a solid foundation for the restructuring of the development path of China's industry.

Unlock the "password" that restricts key technologies

The scale of a country’s industry often depends on the market, labor, land resources, and national capital strength. Relying on the advantages of a large market, abundant labor resources and strong national capital strength, China has successfully expanded many industries in a very short period of time. However, the development of key materials and core components of modern industries has nothing to do with the market, labor, land resources, and national capital strength. Instead, it depends on a country's overall technological innovation capability, industrialization level, and comprehensive national strength. These are precisely the gap between China and developed countries.

From a strategic perspective and overall perspective, the breakthrough capability of key core technologies determines the success or failure of corporate competition and even international competition, and even has a huge impact on national security and the survival of the nation. Key technologies in many fields in my country have long been constrained by others. Only by breaking through the technical bottlenecks of key materials and core components and breaking the long-term monopoly of foreign companies can China's major industries have the right to speak in the world, and China's industries can become stronger. Judging from the actual situation, there is still a long way to go to achieve the above goals. We must clearly understand that the current breakthroughs in the research and development of key materials and core components are not only technical issues, but more external environments and national policies. , And deep-seated issues such as corporate cognition and entrepreneurial mindset.

基礎原料和裝備差導致研發速度受阻

xq

High-end emerging industries such as liquid crystal displays have extremely high requirements for the performance and quality of key materials and components, so R&D and production technologies are difficult. Although my country is a major producer of basic raw materials, the production capacity of stainless steel and many chemical basic raw materials ranks first in the world, but due to the lack of high-performance stainless steel and high-quality basic chemical raw materials, related materials and equipment are produced using them as raw materials. Can not meet the production needs of high-end industries.

It can be said that the quality of basic raw materials directly affects the development and industrialization of key materials and components in the industry. I returned to China to start a business for LCD displays. The quality of the basic materials encountered by the "spacer microspheres" material that caused the delay in the industrialization process is a typical example.

The LCD screen consists of "spacer microspheres" "mixing" in the liquid crystal and "standing" between the glass panels. It mainly plays the role of "skeleton" and can precisely control the thickness of the glass panel. It is like the calcium in human bones. Without it, the LCD panel cannot "stand".

Although the liquid crystal "spacer microspheres" are only composed of ordinary polystyrene and divinylbenzene materials, the polymers used for liquid crystal displays have extremely high requirements on the quality and performance of the microspheres, and must have a high degree of particle size accuracy, Very narrow particle size distribution, excellent mechanical strength, smooth surface properties, extremely high cleanliness and extremely low metal impurities, so the preparation technology barriers are extremely high, for a long time only two Japanese companies in the world can produce.

When we developed the liquid crystal spacer microsphere material, we first encountered the problem of poor quality of domestic basic raw materials. Styrene is one of the general chemical monomers, and its domestic production capacity ranks first in the world. However, the domestic styrene and divinylbenzene have high impurity content (especially the high content of naphthalene impurity), and the spacer products produced with them have low mechanical strength and large deformation, which cannot meet the requirements of controlling the liquid crystal display. As a result, the company had to spend a lot of money. Time to solve the problem of monomer purity.

In addition, we also encountered the problem of unqualified equipment due to poor performance of stainless steel in the process of industrialization. The production of high-performance microspheres requires a stainless steel reaction kettle. After many tests, it was found that the iron content of the LCD spacer microspheres produced by the domestic reaction kettle exceeded the standard and could not meet the high-end requirements of liquid crystal display. It took a year later. , I tried a lot of domestic reactors with the same problem, but the imported iron content reached the standard. After paying such a large time cost and spending a huge amount of people and property, I got such a ridiculous conclusion; the quality of domestic stainless steel is like this, there are very few real stainless steels, and high-performance stainless steels need to be imported!

Therefore, although we have developed advanced microsphere manufacturing technology than Japan, due to the quality of domestic raw materials and the performance of stainless steel, we had to spend a lot of time and energy to solve the problem of poor basic materials before finally realizing the spacer microsphere industry. change. From this case, we can see how difficult it is for China to do research and development of high-tech products, especially key materials and key components of modern industries: not only to solve key technical barriers, but also to solve the problem of poor quality of supporting basic raw materials and equipment! I think This may be one of the important reasons why China has trained a large number of scientific researchers and published the most articles in the world, but the conversion rate of results is extremely low.

Therefore, to solve the key materials and core components of the modern industry, we must first improve the quality of China’s basic raw materials and equipment. Otherwise, even if we have many talents who can solve key materials and core component manufacturing technologies, it will be difficult to make high-performance materials and components. Components to meet the needs of modern industries.

The impetuous society and insufficient basic innovation have hindered the driving force of R&D

Since the reform and development, China has undergone rapid changes. The rapid development has also brought impetuousness and eagerness to quick success in the whole society, and has caused some extremely unreasonable phenomena. Such as rapidly rising housing prices have made real estate speculators huge wealth, while hard-working people are getting poorer and poorer. The serious irrational distribution of social wealth has led to more and more speculative mentality, which undermines China's traditional virtues of hard work and wealth, and the whole society is becoming more and more eager for quick success and quick gain, lacking the patience and perseverance to concentrate on doing one thing well.

However, the research and development and industrialization of key materials and technologies required by almost all industries require long-term investment and accumulation of experience to be successful.

However, few Chinese companies are willing to spend ten years to develop a technology and product. Everyone likes short and fast projects, and is unwilling to invest money and time in advanced technology research and development and materials with high investment, long cycle and high risk. Manufacturing field.

The hidden champion companies in Europe, America and Japan are all formed by intensively working in a field for decades to achieve the ultimate in a material or component. Therefore, if China wants to cultivate invisible champion companies, it must first have a more reasonable wealth distribution system. Social wealth should be inclined to talents who contribute to society rather than speculators, so that technical talents can settle down for a long time to achieve key technologies. The ultimate, let more companies become hidden champions.

On the other hand, although the state has invested a large amount of scientific research funds to support the development of scientific research institutes in universities, since the current evaluation system for university researchers mainly depends on the number of articles published, researchers put more energy and time on how to publish more. More articles instead of in-depth research on original technology or practical technology to solve the core technology of the industry.

The evaluation system based on the number of papers and the control and distribution system of unreasonable funds prevent researchers from sinking in to do original scientific research or focus on core technologies of industrialization, but to do research that is easy to produce articles. Make scientific research input and output disproportionate. For example, although China has already ranked first in the world in the number of articles published in the field of nanotechnology, the number of articles does not match the development of domestic industrialization technology, and the industrialization of nanotechnology and nanomaterials is basically blank. Therefore, only scientific and reasonable adjustments to the scientific research evaluation system and improvement of the incentive mechanism will enable the national scientific research investment to have more achievements transformation, better serve the industry, and better return to the society.

Social impetuousness also has a lot to do with government policies. Since the previous policy is a GDP-oriented evaluation system, governments at all levels are willing to invest in the development of downstream assembly industries that can quickly expand and easily increase GDP and employment. At the same time, due to the excessive investment of local governments, many industries have formed vicious competition after they come to China. For example, the solar panel industry is a typical example of the problem of overheating caused by excessive government investment. The upstream key materials and components require long-term R&D investment, and the scale will not be rapidly enlarged. Therefore, the government's willingness and strength to invest in this area is obviously insufficient.

xq

It is difficult to promote in the domestic market, and the promotion of research and development results is blocked

Since most of China's emerging industries currently rely on imported foreign technologies, and key materials are all imported products. Therefore, the key materials developed by Chinese companies are faced with inherent deficiencies when they are introduced into the market.

First of all, key materials and components have a great impact on the performance of the end product. If the quality is defective, it will cause huge losses to the end customer. Therefore, under normal circumstances, customers are unwilling to take this risk, making it difficult for domestic materials to replace imported materials. .

Even if the customer is willing to import domestic brand materials, the verification cycle is very long. Although the unit price of some materials is very high, the cost ratio of the entire equipment is relatively low, and customers are even less willing to try and replace new products. For example, spacer microspheres, although the unit price is very high, due to the small amount used, they account for less than 1% of the entire display material cost. And this material has a very important impact on the quality of the entire display, so customers are often reluctant to take the risk of adopting domestic products.

Secondly, the prejudice of Chinese people towards domestic and imported products will also lead to difficulties in importing domestic products. For a long time, Chinese manufacturers have been accustomed to producing low-end products, and have not paid enough attention to technology and product quality. Therefore, the general impression is that the quality of domestic products is not good, and they are not assured of using them. Customers will be very cautious about the introduction of domestic products and even increase the import threshold. .

What's more, if a customer has a problem with a domestic product, he will blame the quality of the domestic raw material in the first place; if the customer has a problem with the imported material, he will reflect on the problem with his own process. Therefore, domestic products must be imported to customers, not only to have super-high product quality, but also to be close to customer needs, familiar with customer technology, and to help customers solve practical problems in time when they encounter problems.

To solve the problem of domestic product marketing, it is necessary to combine and reach consensus from multiple parties:

On the one hand, manufacturers of production materials must do a good The better it comes, it may even surpass imported products.

On the other hand, downstream manufacturers also need to have a more open mind and actively cooperate with upstream domestic material manufacturers. The successful industrialization of key upstream materials and components will greatly promote the international competitiveness of downstream manufacturers and achieve mutual benefit and win-win results. At the same time, the country should also introduce some policies to encourage downstream manufacturers to use domestic materials.

Inadequate protection of intellectual property rights hindered R&D initiative

Due to the insufficient protection of intellectual property rights by domestic laws, products and technologies developed over a long period of time are often counterfeited, stolen, and even the entire technical team is dug away, causing huge losses to the company. Due to the lack of respect for Chinese intellectual property rights, input and output are not proportional, which severely restricts the company's motivation for the development of key materials and components.

Therefore, many companies are willing to focus on short-term, fast, low-end manufacturing or downstream assembly with relatively low risks, and are unwilling to invest in high-tech industries with long technology research and development and high risks. Some companies, even if they want to develop high-tech products, have to adopt some security measures because they are worried about technology leaks.

Originally, high-tech development needs to share information and stimulate everyone’s inspiration to promote new ideas and solve problems encountered. However, due to confidentiality reasons, a lot of information cannot be shared and communicated on the technical team, which seriously affects the progress of the project and limits The rapid progress of technology research and development and successful trials. Therefore, strengthening the protection of intellectual property rights and escorting independent R&D companies with laws can enable Chinese companies that really invest in R&D and innovation to be rewarded, and companies that rely on speculation or plagiarism can be punished, and create a healthy development for companies to grow into hidden champions. surroundings.

Limitations of tax policies have hindered the development of key material R&D companies

The preparation of key materials and core components has the characteristics of high technical barriers and high added value, but it also has the risk of large R&D investment and long cycle. The activation labor cost of this kind of enterprise is mainly in terms of R&D investment, personnel wages, production area rent, etc., which is much higher than that of traditional enterprises. If the current value-added tax deduction method in China is used, this part of the cost cannot be deducted, which will make the tax burden of the enterprise. Higher, greatly reducing the profitability of the company, making the company do not have enough funds to invest in more research and development of new products and technologies in the early stage.

In fact, the Chinese government is also aware that value-added tax will affect the development of high-tech enterprises, so there are special value-added tax policies in some special fields such as software, chip and biopharmaceutical industries. However, key material manufacturing companies that are similar to these industries are currently unable to enjoy these special policies.

Therefore, if the state wants to solve the problem of key materials and core components, it must improve the inclusive tax policy that supports enterprise innovation, expand the scope of tax-preferential industries for high-tech enterprises, and effectively solve the tax dilemma faced by advanced material manufacturing enterprises, and reduce the burden on enterprises. Only by adding wings to innovation can it benefit the development of China's high-tech industry, and enable scientific and technological research-oriented companies that are willing to compete with foreign monopolies to truly embark on the path of becoming an invisible champion.

Cultivating invisible champion companies is a "breaking move" in China's industrial transformation and upgrading

For China to truly complete its economic transformation and transform from an economic power to a powerful country, it must put the key materials and components for solving the industry in the first place, and it must cultivate more invisible champions in order to truly achieve a large and strong industrial development, and to have independence. Right to speak. "Invisible champions" refer to those small and medium-sized enterprises that are very dedicated and have global or regional market leaders. Their products may be small, they do not meet directly with consumers, and they are not easily noticed. In addition, they are low-key and have relatively public visibility. Low, but they are often the game rules makers in their respective industries and the unshakable hegemon of industrial development.

Based on this, if Chinese companies want to become invisible champions, they need to have strong innovation capabilities, persist in long-term and unremitting research and development, and use ingenuity, patience, perseverance and confidence to achieve the ultimate in technology and materials.

Insist on innovation to occupy the commanding heights of technology

Whether a company can become an invisible champion in global competition depends on whether the company has strong innovation capabilities and whether it occupies the commanding heights of the world's key material preparation technology. Whether it is chips in the electronics industry, aircraft engines, or simple ballpoint pen cores and high-speed rail screws, they are all made with advanced technology and exquisite craftsmanship. To achieve the commanding heights of a field of technology, it is often not quickly obtained by a large number of people or short-term money. China’s past model of rapidly expanding its industry by relying on a large number of labor resources and a large amount of investment does not work.

At present, what China needs most is to form an innovative scientific research environment that can attract a group of world's top scientists to rest assured, occupy the commanding heights of technology through long-term innovation and technological accumulation, so as to solve the localization of key materials and components.

Insist on focus and perseverance to persevere unwavering

China has developed into the second largest economy in the world and has abundant labor resources, capital, talents, markets, and industrial chains. The biggest shortcoming is lack of patience and perseverance.

The development of modern industries is becoming more sophisticated, automated, and high-performance. These development trends place higher and higher requirements on key materials. At the same time, because key materials and components have a great impact on the performance of downstream products, there is often a winner-takes-all situation in the material field, that is, the best-doing company gradually becomes the invisible champion of the industry, forming a monopolistic situation of dominance and quality. Poor companies are basically unable to survive. China already has strong assembly capabilities. As long as it has key materials and components, it will quickly produce related products. Similarly, whoever monopolizes these key materials has the supreme right to speak in the industry chain.

The invisible champion enterprise is to stick to a sense of mission and national sentiment, not forget the original aspiration, and persevere until it succeeds once it recognizes a goal. This kind of dedication and long-term persistence is especially commendable in today's impetuous society.

Insist on the craftsman spirit to achieve the ultimate in products and craftsmanship

"Technology can be advanced, art can be linked to God." The core content of the craftsman spirit is to strive for perfection. To achieve the ultimate in products and work, we must rely on meticulous and rigorous and pragmatic attitudes. Continuous improvement, innovation and optimization of products must be It is the unswerving pursuit to master the top technology in the industry and create the highest quality products. I have visited a small and medium-sized enterprise that produces industrial fans in Germany. In order to detect the noise when the fans are running, I have specially built an advanced silent laboratory where I can hear my heartbeat.

In order to improve the quality, we are willing to invest and dare to invest. Such products will undoubtedly have strong international competitiveness. Craftsmanship is not only excellence, but also a pursuit, a responsible attitude, and a promise to endure loneliness. I think this should also become the pursuit of China's hidden champion companies, using the best technology to make the best products.

Source: Innovation Society

Scan the QR code to read on your phone

Online consultation

Username used for comment:
客戶留言
Description:
驗證碼

More information

Contact Us

ADD:Weihai Lingang Economic and Technological Development Zone, Zhejiang Road

Manager Zou:+86-18660362576

Online Message

Username used for comment:
客戶留言
Description:
驗證碼

Copyright Weihai Weiliu Measure & Control Instrument Co., Ltd   魯ICP備15020907號-1 Powered by www.300.cn

主站蜘蛛池模板: 国产噜噜在线视频 | 日韩一级片免费看 | 日韩免费伦理片 | 国产91豆花视频 | 香蕉嫩草视频 | 一区首页 | 欧美黑人性爱影院 | 三级免费女 | 欧美地址一二三 | 日韩电影快播 | 国产欧美| 91性感美女 | 亚洲中文欧美 | 日韩成人伦理 | 91最新网站 | 日韩看片福利 | 超碰91在线 | 丁香五月中文网 | 国产家庭乱伦视屏 | 91干逼国产精品 | 91自拍最新网址 | av免费在线| 操操操黄色网页 | 中国黄色三级毛片 | 91日韩xxx | 91嫩操在线| 亚洲婷婷成人 | 国产在线精品观看 | 91色妹妹| 日韩91无码视频 | 欧美色色区 | 日韩亚洲中文字幕 | 自拍国产视频 | 成人黄片免费 | 主播一区二区豆花 | 午夜看片福利 | 国产激情欧美有码 | 91自拍刺激| 91茄子免费 | 四虎亚色 | 日韩淫片| 韩日毛片| 五月天淫淫网 | 91丝袜长腿国产 | 国产伦子伦露脸 | 激情福利网 | 免费久草网 | 久草在线资源站片 | 欧美变态人妖另类 | 日本爽快片100 | 免费更新黄色网址 | 蜜桃福利导航 | 国产免费看二区 | 成年人网站黄 | 青草人人| 欧美成人区 | 欧美另类高清 | 91香蕉短 | 玉足午夜影院 | 国产欧美一二三区 | 国产a国产片国产 | 日本三级视频这些 | 国内伦理视频 | 日本三级全黄 | 伦理片免费在线看 | 国产视频在线免费 | 免费国产在线播放 | 国产伦理在线观看 | 欧美在线视频精品 | 免费网站成人 | 国产视频第一页 | 国产乱肥老妇 | 国产成人综合精品 | 欧美日韩性生活片 | 97伦理片| 伦理视频在线 | 欧美日韩小片 | 日本乱码中文字幕 | 男人的天堂AV黄 | 欧美激情乱妇 | 欧美日韩首页 | 欧美色图乱伦小说 | 黄色网站免费看片 | 91精品在线播放 | 国产无精品 | 成人性无码| 日本色xxx| 五月天综合 | 日本精品二区 | 无码一区二区毛片 | 91网站下载 | 欧美在线免费 | 尤物在线91| 日韩免费小视频 | 久久午夜福利电影 | 丁香五月网站 | 97色超久碰操 | 欧美激情第18页 | 午夜伦理剧场 | 伊人婷婷丁香 | 偶爱撸91久久 | 日韩精品资源 | 日韩欧美深夜福利 | 国产另类| 成人无码视频播放 | 在线影院福利社 | 欧美区亚洲区 | 国产91 | 人妖网站综合 | 黄色91免费下载 | 免费日韩高清无码 | 微拍福利在线看 | 另类人妖视频 | 欧美高清另类 | 午夜福利你懂 | 宅宅网伦理片 | 四虎影院永久地址 | 欧美另类人与兽 | 91视频网页| 青青草福利导航 | 福利在线无码69 | 足交av91 | 国产免费爽爽视频 | 日韩成人影院 | 人人干狠狠撸 | a片在线播放网址 | 日韩在线资源 | 在线成人色网 | 国产高清精品 | 孕妇av在线观看 | 午夜精品蜜桃 | 日韩成人手机在线 | 四虎色色虎 | 日韩理论片在线 | 欧美日日骚| 美女黄色网 | 午夜性福利视频 | 美国四季青草 | 成人自拍在线 | 青草激情五月天 | 成人禁播 | 草逼的免费 | 一卡二卡精品 | 欧美色图自拍偷拍 | 成人动漫日韩 | 日本伦理片在线看 | 国产99在线 | 久草免费资源在线 | 国产91在线免费 | 国产精品精品精品 | 美女成人精品专区 | 先锋亚洲欧美日韩 | 伦理片免费看 | 日韩电影大全 | 夜夜操亚洲| 欧美福利一级黄片 | 久草视频在线资源 | 欧美日韩国产一区 | 欧美一二三性交 | 亚洲人综合18 | 午夜丁香婷 | 深夜少妇福利在线 | 熟女乱伦文学 | 亚洲欧洲精品在线 | 欧美性爱去干网 | 一卡毛片 | 国产精品福利在线 | 国产操孕妇视频 | 欧美日韩一区二 | 萌白酱国产在线 | 欧美性免费 | 密臀AV无码 | 国产成a人亚洲精 | 欧美孕妇日日 | 香蕉视频免费下载 | 老湿机69福利 | 亚洲欧美一区二区 | 亚洲综合导航 | 福利日韩 | 97伦理电影院 | 91自拍720| 91大神磁力链接 | 超清免费在线 | 欧美在线xx| 国产无码一二 | 伦理在线观看视频 | 免费在线伦理电影 | 在线swag | 三级色孕妇视频 | 欧美性爱午夜影院 | 欧美在线视频一区 | 三级视频网站在线 | 优酸乳成人无码片 | 老湿福利社区 | 岛国大片破解版 | 深夜爱福利视频 | 欧美变态另类 | 91精品久久| 日本黄色国产精品 | 高清日本在线电影 | 成人在线精品 | 一区影院 | 午夜免费福利黄片 | 国产精品午夜视频 | 成人片免费 | 午夜在线插 | 伦理资源站 | 国内精品在线播放 | 五月激情婷婷小说 | 欧美性受免费 | 日本v片 | 亚洲欧美另类 | 亚洲免费 | 日韩美女影城 | 日本三级视频网址 | 国产免费视频 | 18禁喷水 | 一级国产大片 | 国产91自拍在线 | 国产日韩另类中字 | 91自拍视频 | 深夜福利精品三区 | 日韩在线网 | 青草福利社 | 91视频最新地址 | 成年人免费看电影 | 国产成人免费看片 | 国产精品三级电影 | 国产精品手机在线 | 超碰在线观看97 | 高清日韩在线 | 三级A片视频 | 青青国产视频 | 久草cn| 国产欧美日韩不卡 | 国产在线色 | 久草热线 | 日本α片祼毛 | 成人99精品| 欧美福利在线观看 | 国产精品日本色色 | 国产剧视频大全 | 日本欧美第一页 | 最新版的毛片网站 | 国产欧美日韩视频 | 国产在线主播 | 欧美福利一级黄片 | 恋足国产免费专区 | 亚洲欧美日韩tv | 国产h在线播放 | 综合色色综合 | 日韩欧美在线成人 | 成人午夜伦理视频 | 国产福利社在线 | 最新午夜宅男 | 成年女人看的 | 综合激情网 | 成人豆奶| 一区亚洲人妻 | 亚洲午夜在线视频 | 欧美精品一二三区 | 成人免费在线看片 | 国产无码片子在线 | 欧美成人撸 | 免费的黄色网址 | 免费高清成人 | 91茄子在线 | 最新色吊丝 | 黄片导航在线 | 日韩制服丝袜在线 | 国产黄频网站 | 中国大陆成人毛片 | 午夜福利WW| 久久麻豆精品 | 成人动漫网站 | 91呆哥在线播放 | 日本第二片区 | 日本高清在线不卡 | 欧美精品五区 | 3d成人动漫网站 | 欧美日韩资源 | 丝瓜视频91| 成人无码免费毛片 | 成人小电影 | 欧美亚洲国产日韩 | 丁香五月婷婷六月 | 国产乱伦免费视频 | 国产麻豆精品免费 | 免费伦理片电影 | 午夜激情福利影院 | 国产精品免费 | 91精选| 欧美性爱影院 | 91大神国内精品 | 高清国产一区二区 | 国产吃瓜在线播放 | 变态欧美乱伦视频 | 欧美视频不卡 | 欧美视频社区 | 国产深夜激情视频 | 日韩欧美色综合 | 成人动漫二区三区 | 免费看h视频 | 69叉叉叉| 日本不卡三 | 91色在线视频 | 香蕉手机网的简介 | 丰满五月天天 | 孕妇AV无码 | 成人三级色 | 美女全黄视屏 | 91国产精品区 | 日韩高清中文字幕 | 国产高清视频网站 | 丁香五月新网站 | 五月婷丁香网 | 97精品一区| 免费日韩伦理片 | 日韩欧美站 | 黑色丝袜自慰喷水 | 亚洲日本国产 | 一本大道香蕉久 | 日韩欧美导航 | 午夜人妖另类 | 狠狠撸福利导航 | 免费A片网 | 亚洲国产高清无码 | 欧美性爱网一区 | 三级网站免费大全 | 丁香五月婷婷色 | 国产极品173 | 成人肉漫在线观看 | 精品国产麻豆免费 | 善良的嫂子伦理片 | 岛国片欧美 | 女同91| 国产免费两性视频 | 日韩美女影城 | 欧美日韩免费看片 | 日韩欧美网址 | 深夜伦理 | 强奸制服中文字幕 | 久草视频官方网站 | 91免费网站视频 | 毛片传媒 | 成人午夜在线观看 | 谁有免费黄色网址 | 午里影院打屁屁 | 日韩美女bb| 成人免费视频下载 | 欧美专区在线观看 | 日韩欧美线观看 | 午夜爱婷婷 | 日本一级大片 | 爱豆传媒0087 | 日韩欧美美女视频 | 亚洲精品视频一 | 手机看片在线 | 操操操无码视频 | 国产高颜值露脸在 | 青青草自拍 | 欧美成年人在线 | 羞羞网站在线观看 | 日韩肏逼视频 | 91视频种子| 91九色| 亚洲久热| 日韩成人亚洲 | 97成人影视 | 国产精品91在线 | 91足交在线 | 三级理论网站 | 男人女人黄色网址 | 久久精品视频77 | 欧美极品综合一区 | 91超视频豆花 | 91你懂得| 深爱婷婷激情 | 国产成人在线网站 | 欧美另类小说专区 | 东京热一二三四区 | 自拍偷拍第1页 | 青青视频网站 | 国产精品成人影片 | 日韩美女电影 | 欧美激情网址 | 丝袜欧美日韩变态 | 中文字幕第一页 | 日韩在线视频网 | 在线视频一区二区 | A片黄片免费片 | 97伦理电影| 欧美色图婷婷 | 国产日韩电影 | 国产视频亚洲 | 亚洲五月丁香综合 | 国内操大笔AA级 | 97在线观 | 日韩免费在线视频 | 日本韩国影视 | 久久爱88| 一线天无码视频 | 91社在线看片 | 欧美操屄 | 日韩aⅴ电影0 | 中文字幕精品一区 | 亚洲福利 | 青青国草在线视频 | 亚欧福利片 | 国产日产欧产综合 | 亚洲成年影院 | 国产第一页浮力 | 日本成年人网址 | 久草中文视频 | 亚洲第一av| 国产中文字幕网 | 亚州综合激情网 | 在线免费小视频a | 日韩第二页 | 无码约操孕妇 | 宅男福利在线 | 97在线亚洲| 青青草在线观看 | 欧美AA黄| 亚洲网站视频在线 | 五月天午夜影院 | 91香蕉污APP| 免费观看国产精品 | 成人影片网站 | 四虎最新网名免费 | 免费成人a黄 | 免费看国产黄片 | 综合激情在线 | 免费看污污网站 | 狼友视频123 | 成人伦理在线观看 | 成人午夜爽a | 国产高清中文精品 | 能看肏屄的网站 | 久草入库了吗AV | 美国伦理片在线 | 免费国产在线看 | 国产精品自拍偷拍 | 狠狠撸综合 | 成人大片一级天天 | 激情婷婷网| 亚洲做性爱视频 | 久草福利在线资源 | 加勒比欧美性爱 | 久久福利影院 | 精品无码成人av | A片三级片| 秒拍福利在线 | 日韩新片网站 | 日韩精品视频四区 | 欧美呦呦在线观看 | 国产免费不卡 | 在线观看91视频 | 久久精品视频人妻 | 成人快播视频 | 在线@久草| 午夜两性网 | 91成人看片 | 国产永久免费无 | 3d成人动漫网站 | 日韩少妇精品视频 | 免费视频一区二区 | 精品国产乱码 | 四虎最新在线观看 | 国产目拍亚洲精品 | 日本成人网站免费 | 国产一区2区3区 | 日本伦理电影 | 97青青碰 | 男女上床免费网站 | 国产成人自慰无码 | 国产免费屄视频 | 欧美人妖黑人妖 | 欧美午夜性爱网 | 国产日韩欧美综合 | 乱伦91视频| 5月丁香婷婷网 | 国产一区二区在线 | 香港伦理在线播放 | 日日干夜夜操 | 少妇精品 | 欧美成人性爱图片 | 青青草电影院77 | 国产福利小视频 | 欧美激情第15页 | 激情影院日韩 | 欧美在线1 | 亚洲性爱导航 | 国产女人在线视频 | 欧美日一级片 | 日韩欧美亚洲区 | 91足交在线看 | 97mm草莓视频 | 成人亚洲免费 | 国产99热精品 | 久草网在线 | 国产一区国产二区 | 成年免费在线视频 | 91操人视频| 虐待孕妇av | 成人深爱网| 91超自碰| 日韩在线电影观看 | 伦理片年轻的妈妈 | 在线视频福利导航 | 亚洲精品颜射 | 91免费国产精品 | 一级片av| 久久精品视频人妻 | 会所AV| 中文日韩在线 | 免费污的网站 | 欧洲色网 | 91视频论坛首页 | 亚洲欧国国产精选 | 国产精品人人 | 青青草自拍视频 | 久草视频网站 | 四虎社区 | 欧美福利在线一区 | 无码福利社 | 青青操国产视频 | 干孕妇AV | 国产自拍 | 欧美xxx在线 | 亚洲Av动漫 | 男女打炮网站 | 手机电影天堂 | 国产精品自在自线 | 日本制服丝袜在线 | 在线国产视频 | 日韩国产欧美视频 | 91专区| 国产美女免费在线 | 日韩轮奸电影网 | 精品一卡二卡 | 91操碰在线 | 亚洲欧美一区二区 | 欧美深夜福利影院 | 久久加勒比久久 | 精品aa| 福利午夜激情电影 | 污污A片| 免费欧美在线观看 | 91九色在线观看 | 精品国产网站 | 狠狠肏逼视频 | 成年免费电影 | 三级黄色www | 91一级在线| 免费久草网 | 97超碰大香蕉 | 免费影视观看 | 国内精品在线看 | 欧美性性潮喷 | 成人福利影院 | 成人福利免费观看 | 成人精品视频在线 | 亚洲欧美日韩区 | 亚洲成人精品久久 | 伦理剧妈妈的朋友 | 精品999| 另类人妖视频 | 4虎视频| 欧美喷潮视频 | 国产在线视频不卡 | 日本中文字幕观看 | 在线看伦理片 | 亚洲综合see | 国产九九精品视频 | 91视频不卡 | 日本在线播放视频 | 三级网站免费播放 | 青青草国语版 | 狠狠撸在线视频 | 最新午夜福利视频 | 性爱激情网址 | 国产武打片老电影 | 丁香五月天堂网 | 人人干人人操 | 怡春园AV| 国产不卡在线观看 | 偷偷撸狠狠操 | 91豆花成人 | 欧美一二三区 | 免费福利| 日韩在线高清在线 | 91抖阴免费草逼 | 孕妇成人AV | 欧洲电影及电视剧 | 国产乱理伦片在线 | 欧美激情福利网 | 成人精品区国产 | 丁香五月播 | 国产在线等一页 | 国产精品福利 | 欧美在线直播 | 成年免费在线观看 | 亚洲一区二区 | 成人精品影院亚洲 | 日韩伦理在线电影 | 日韩欧美123区 | 高清国产精品大全 | 日韩aⅴ电影 | 日韩亚洲国产成人 | 成人短视频app | 日本伦理电影免费 | 丝瓜视频草莓视频 | 内射的网站 | 日本三级伦理 | 国产精品高清精品 | 午夜伦理视频视频 | 男女日B视频 | 日韩欧美视频在线 | 午夜羞羞网站 | 影音先锋人妖系列 | 91精品国产91| 日韩视频二区 | 青青草18| 曰本黄色三级网站 | 国产精品人成在线 | 欧美黄片区 | 一级一片免费播放 | 很黄很污的网站 | 狠狠撸福利导航 | 91我要操| 国产精品综合网址 | 孕妇成人无码免费 | 国产曰韩 | 波多野洁衣人体 | 福利社色色 | 丁香五月无码视频 | 日本三级乱码 | 91探花 | 三级国产三级在线 | 激情婷婷五月天 | 福利同城91在线 | 尤物福利视频 | 欧美伦理片电影 | 黄色东京热三级片 | 男人的天堂AV黄 | 欧美性交影院 | 久草手机视频在线 | 人人撸人人草 | 男人女人三级黄片 | 午夜理论在线 | 午夜福利老湿机 | 国产爱v日内| 三级激情在线网址 | 私人影院| 国产在线视频福利 | 青青久久 | 国产欧美精| 日本xxx色 | 亚洲无码一卡二卡 | 三级黄色片网站 | 波多野洁衣性感 | a片网址大站 | 国产视频在线 | 好色色影院 | 四虎永久免费 | 人人操日日撸 | 国产福利啪啪 | 成人三级伦理电影 | 成人情一区二区 | 91嫩草香蕉 | 国产福利小视频 | 18免费网站 | 女人看黄网站 | 国内精品小视频 | 免费播放片大片 | 岛国大片手机网址 | 东京热三级片 | 国产屁屁| 日本韩国欧美一区 | 成人黄app福利 | 午夜宅男在线视频 | 日韩欧美一二三区 | 成人福利污导航秘 | 最新国产精品视频 | 伦理片在线观看 | 在线欧美V | 熟妇熟女乱 | 日韩成人aⅴ | 西瓜电影伦理 | 久草中文在线 | 日韩成人豆花视频 | 宅男福利在线观看 | 亚洲日本三级在线 | 无码精品一区 | 在线观看av三级 | 国产精品自在自线 | 人兽福利影院 | 成人影视网| 欧美一页| 夜间福利久久 | 国产探花在线观看 | 三级网址全 | 国产精品青草久 | 日本a在线播放 | 成人高清日本 | 五月激情天 | 日韩欧美亚洲中文 | 欧美一区黄色网站 | 偷拍盗拍视频密桃 | 91黄色软件 | 在线日韩欧美国产 | 91影院在线观看 | 91手机看片福利 | 成人伦理视频 | 青青草tv| 日韩在线免费 | 年轻的母亲2伦理 | 日日撸影院在线 | 国外人妖网站 | 日韩精品手机在线 | 黄色软件下 | 狠狠撸狠狠干欧美 | 日韩美女肏屄 | 国产成人精品网 | 欧美足交免费看 | 91视频国产大片 | 亚洲热线99精品 | 久久国产成人精品 | 人妻精品无码 | 日韩欧美美女视频 | 日韩高清区 | 日本一级aaa | 18禁白丝白乳 | 日韩伦理片在线看 | 欧美日韩黄片 | 97mm草莓视频 | 黄色片手机在线看 | 深夜福利导航日韩 | 国产干逼视频 | 人妻少妇无码 | 制服丝袜日韩在线 | 日本午夜无码视频 | 私人影视免费播放 | 午夜福利视频无码 | 三a级免费黄毛片 | 日本视频www | 久草新视频在线 | 探花大神| 欧美插逼电影 | 97在线观| 欧美剧频道 | 亚洲国产亚| 成人影院在线观看 | 国产成人不打码 | 91爆逼| 官方免费毛片网站 | 日日日日狠狠干 | 亚洲制服欧美视频 | 91敢逼| 三级无码在线播放 | 91自拍视频在线 | 深夜福利导航 | 国产h片在线播放 | 午夜男女爱做网站 | 福利一区二区在线 | 日韩福利片第三页 | 91华人在线 | 国产在线视频奶水 | 青草娱乐在线观看 | 日韩高清免费 | 黄片网站导航 | 91在线免费视频 | 四虎影库 | 激情性爱自拍 | 丁香五月综合一致 | 欧美影院成年 | 亚洲美女啪啪视频 | 强奸亚洲欧美 | 午夜操一操在线 | 欧美电影在线观看 | 午夜羞羞欧美 | 青青草在线影院 | 国产A∨免费精品 | 福利所导航视频 | 日本电影成人 | 黄片免费看地址 | 在线观看A片网站 | 日本在线播放免费 | 暖暖日本韩国 | 人妖另类日韩欧美 | 国产视频熟女 | 日韩综合导航 | 免费在线成人 | 三级在线网站网址 | 亚洲日本欧美精品 | 91久久影院| 未满十八午夜福利 | 草逼专区 | 探花精品福利在线 | 日韩无码中文字幕 | 3D色色的网站 | 丝袜高跟诱惑一区 | 国产福利观 | 日本三级网址 | 国产影视三级乱伦 | 伊人熟女丁香 | 无码碰操 | 成人福利污导航秘 | 日本韩国伦理片 | 国产综合在线观看 | 国产99精品99| 操操操综合影院 | 午夜福利入口在线 | 欧美喷潮流量另类 | 超碰免费97 | 91精品综合| 久草在线精选 | 免费看片的网站 | 日日干夜夜 | 91日夜a爽v干| 午夜福利在线视屏 | 日本中文字幕二区 | 日本波多野 | 午夜激情福利电影 | 夜夜影院资源 | 丁香五月天啪啪 | 日本在线免费电影 | 国产激情免费播放 | 福利导航网 | 日韩精品在线观看 | 伦理片欧美 | 狠狠五月婷婷 | 欧美性天天 | 一区二区免费国产 | 在线播放黄色av | 亚洲无码在线专区 | 福利理论片影院 | 三级在线a片 | 成人影院伦理电影 | 欧美影院伦理私 | 黄色一级片 | 欧洲亚洲视频 | 黄视网站在线播放 | 欧美大片免费观看 | 日本不卡高清在线 | 资源网av | 精品亚洲中文字幕 | 精品久久一区二区 | 午夜福利干逼 | 欧美日韩在线另类 | 欧美a日韩aa| 熟女乱伦网 | 午夜黄色网址 | 91呆哥在线播放 | 加勒比操逼视频 | 亚洲免费在线观看 | 日韩A∨视频 | 亚洲精品无码少妇 | 国产四区 | 国产亚洲日本精品 | 欧美经典人妖系列 | 三级黄色在线网站 | 欧美精品五区六区 | 丝袜足交在线 | 免费黄片网站 | 免费久草网| 手机凤凰网 | 中文字幕国内自拍 | a片网站入口 | 欧美呦呦在线观看 | 97午夜福利| 18禁看喷水 | 人人爱人人操 | 欧美午夜剧场0 | 欧美日韩一区不卡 | 日韩欧美国产 | 国产精品视频不卡 | 成人高清无码精品 | 女同电影在线播放 | 亚洲另类都市激情 | 高清伦理电影 | 91插逼免费网站 | 国产高清一区 | 在线亚洲欧美日韩 | 无码精品一区 | 69国产成人精品 | 欧美日韩免费影院 | 国产第一福利网站 | 青青碰激情视频 | 亚洲色图第一页 | 国产TS久草AV | 蜜桃网探花视频 | 国产a级国片免费 | 亚洲五月丁香激情 | 尤物com | 日本伦理在线三区 | 日嫩逼淫院 | 国产特级片 | 日韩无码视频网站 | 福利精品第一导航 | 四虎直播在线观看 | 91爱爱前入| 91午夜福利电影 | 美国伦理电影禁忌 | 狠狠撸亚洲欧美 | 一级国产视频 | 草逼牛牛| 精品国产欧美日韩 | 免费黄页网 | 日韩黄色网址 | 国产自拍日韩精品 | 日本三级网址黄色 | 潮吹久久| 国产午夜无码喷水 | gay片免费网站 | 午夜宅男视频 | 97韩剧网 | 黑料在线资源国产 | 久久午夜福利毛片 | 伦理片免费电影 | 泰国最美人妖电影 | 日本另类喷潮 | 欧美一区在线观看 | 91伦理片| 国产精品毛片 | 美女黄视频网站 | 欧美伦理片导航页 | 国产日本精品 | 午夜aV啪啪 | bt种子下载| 久草视频免费资源 | 香蕉AV| 五月花亚洲 | 欧美福利一区 | 亚洲欧美在线强 | 亚洲伦理电影网 | 最新啪啪网站 | 免费看黄网址 | 成人黄色无码 | 日韩美女大片 | 午夜视频福利一区 | 欧美日韩福利 | 国产原创区 | 亚洲综合在线婷婷 | 97伦理片 | 成人伦理 | 日本免费观看片 | 国产在线播放不卡 | 成人午夜免费影院 | 中国午夜不卡 | 丝袜人妖 | 欧美另类色图片 | 国产在线观看一 | 免费国产成人电影 | 免费看欧美大片 | 91国在线视频 | 黄W色W艹成人艹 | 香蕉视频免费在线 | 超碰碰总资源网站 | 午夜精品在线 | 国产做爱无码二区 | 三级网站播放 | 丁香五月人妻 | 国产成视频 | 男女操逼福利 | 欧洲精品黄片 | 福利精品第一导航 | 国产无人区 | 酱视频在线入口 | 美女三级片网站 | 中文字幕无码毛片 | 丁香五月花成人网 | 日本三级官网 | 人妻夜夜爽 | 亚洲高清欧美中文 | 日本伦理在线观看 | 国产白丝在线观看 | 黄色三级无码 | 欧美色图乱伦小说 | 免费看片神器下载 | 欧美日韩乱伦 | 18禁喷水流白浆 | 青青草原直播 | 国产自拍成人 | 国产ts在线播放 | 欧美性爱色 | 97国语精品自产 | 免费看v片 | 国产干美女 | 日本高清人体 | 国产日本亚洲 | 欧美性爱视频三区 | 依人青青草 | 国产三级视频网站 | 欧美国产日韩精选 | 国产精品一 | 香蕉视频污片 | 光根影院理论片 | 国产中文字幕日韩 | 国产日产免费高清 | 欧美精品免费观看 | 91国产精选 | 在线黄网站免费 | 欧美插插 | 日本在线电影网 | 国产二区精品无码 | 香蕉91视频 | 夜福利导航 | 欧美理论片 | 国产三区五五影视 | 伦理电影免费在线 | 欧美人妖黑人妖 | 人人看操碰 | 三级网站三级网址 | 91伊人国产 | 欧美2区| 免费大黄在线看 | 内射美女网 | 免费h片网址 | 在线免费不卡视频 | 91插插插| 国产精品人成在线 | 激情深爱欧美激情 | 黄色三极片 | 欧美免费私人影院 | 日韩欧美亚洲区 | 一起撸综合网 | 最大中文字幕福利 | 吉林五月花综合网 | 五月激情色播网 | 美日韩黄色片 | 欧美福利资源导航 | 欧美在线午夜 | 91视频第一页| 高清日本 | 激情综合亚洲婷婷 | 丝袜av亚洲 | 另类人妖| 欧美三级午夜 | 免费淫网 | 国产免费观看网站 | 国产无码性| 伦理片久久精品 | 欧美高清另类 | 欧美性疯狂669 | 午夜福利视频导航 | 欧美极品免费 | 日本韩国中亚 | 三级成人性视频 | 国产二区视频 | 成人自拍视频在线 | 国产久草视频 | 91影院在| 亚洲五月花 | 中文自拍 | 欧美另类亚洲 | 91视频丝瓜 | 午夜成人剧场 | 91一级在线 | 精品福利在线视频 | 香港日本三级学生 | 潮喷福利| 夫妻午夜视频 | 欧美一区精品 | 久久99国产 | 国产精品免费大片 | 欧美日韩性爱网址 | 日韩电影在线播放 | 综合五月网 | 香蕉草莓社区 | 男男性爱影院传媒 | 91香蕉污APP| 丁香婷婷五月底 | 偷拍草草草 | 欧美性爱资源 | 日韩在线电影网 | 免费看黄片毛片 | 97蜜桃| 91超碰在| 黄色软件大全下载 | 国产第一福利 | 疯狂少妇喷潮 | 91婷婷| 美女视频网站色 | 午夜福利老湿机 | 三级男女网站 | 啪啪网站有哪些 | 手机看片 | 国产精选在线视频 | 成人影院免费观看 | 成人看片免费视频 | gay片网站| 日韩伦理色色影院 | 操碰100| 日本三级网页 | 91视频直播免费 | 潮喷福利 | 精品国产无码电影 | 高清下载 | 欧美性乱伦 | 91茄子免费| 日本天堂a| 国产视频新区 | 激情涩涩网 | 日韩美女精品 | 日本高清电视 | 日韩丝袜第一页 | 伦理片精油按摩 | 91社区国产在线 | 日本三级片强奸 | 黄色毛片视频大全 | 91秘入口| 91大神导航 | 在线观看h视频 | 国内精品免费视频 | 91在线精品 | 老湿影院体验区 | 日本精品在线播放 | 高清伦理 | 日本韩国伦理电影 | 午夜福利电影91 | 伦理三级在线观看 | 狼友深夜福利 | 中文字幕国内自拍 | 三级色孕妇视频 | 91视频观看在线 | 丁香五月亚洲网 | 国产美女在线人 | 欧美精品电影在线 | 日本在线免费电影 | 成人亚洲视频30 | 国产乱伦免费观看 | 五月天婷婷伊人 | 国产免费观看网站 | 丝袜女同 | 毛片在线网站 | 午夜A片三级 | 91精品一区二区 | 性欧美极度另类 | 美日韩性爱自拍 | 91香蕉污 | 国产不卡一区0 | 国产主播福利 | 岛国123 | 福利视频资源站 | 精产国品| 国内自拍第一页 | 国产在线观看二区 | 日韩免费顶级影视 | 91最懂男| 三级国产 | 精品国产91观看 | 日本福利片一区 | 成人无吗毛片 | 日韩经典第一页 | 成人动漫电影 | 黑料超碰在线 | 日韩第一精品 | 成人亚洲视频 | 亚洲伦理影视 | 老湿A午夜影院 | 青青草在线观看 | 国产在线导航 | 69精品人人人人 | 91尤物后入 | 91自拍精品 | 福利日韩第一导航 | 欧美性爱网页 | 国内主播第一页 | 国产美女大秀 | 欧美性爱成人二区 | 日韩免费高清在线 | 伦理在线电影 | 日本欧美电影 | 精品资源男人社 | 成人三级色 | 年国产大片 | 欧美熟女另类 | 日韩午夜伦理片 | 欧美性爱网站大全 | 成人性爱无码毛片 | 波多野解衣 | 国产午夜免费视频 | 伦理片完整版 | 欧美一区xxx| 欧美aⅴ在线视频 | 在线观看成人亚洲 | 结衣波多野作品 | 乱伦悠悠一区二区 | 欧美日韩射射 | 深夜福利性爱视频 | 无码啪一啪在线 | 国产日韩在线观看 | 日韩视频二区 | 国产剧在线观看 | 日韩一道高清无码 | 午夜福利男女 | 成人黑料AV | 欧美天堂香蕉 | 青青草在线看 | 欧美韩日逼 | 日韩欧美导航 | 伦理片善良的嫂子 | 福利国产精品 | 日韩性爱福利视频 | 黑料超碰在线 | 波多野结yi| 成人午夜性a一 | 免费无码一区二区 | 成人无码在线播放 | 欧美在线影院 | 日韩欧美福利 | 激情伊人五月天 | 狠狠干91 | 欧美逼逼 | 日韩美女在线视频 | 成年人app | 偷拍福利导航 | 日韩免费视频播放 | 97精品在线播放 | 91精品豆花 | 另类导航| 国产亚洲系列 | 欧美孕妇三级黄片 | 草逼91| 91黄色干逼| 亚洲欧美日 | 成人色情福利看片 | 日韩第32页| 国产视频爱拍原创 | 福利资源在线观看 | 深夜福利久久 | 日韩黄色大片网站 | 最近中文草逼 | 欧美日韩卡一 | 青青草国产线观 | 强乱午夜影院 | 日本天堂在线 | 国产女同网站 | 欧美视屏 | 一区精品麻豆经典 | 日韩电影在线看 | 日爱碰91 | 午夜影院黄片 | 国产不卡a国内 | 国产3级 | 日本黄色网页 | 国产一区二区播放 | 午夜中文乱伦福利 | 欧洲激情网 | 青青草在线播放 | 国产传媒网站0 | 成人大片免费看 | 西瓜影院视频全集 | 国产尤物 | 国产3级在线观看 | 国产在线看片网站 | 黄色软件免费下载 | 亚州v区电影 | 日本中文视频在线 | 欧美免费在线 | 操操自拍 | 丝瓜视频成人 | 国产视频导航 | 成人精品福利 | 男人的天堂av网 | 欧美性爱96av | 欧美视频网站 | 久草乱码 | 欧美国产一区二区 | 亚洲欧美日韩精品 | 无码国产免费 | 碰91在线视频 | 亚洲色情在线 | 欧美在线综合 | 亚洲天堂性爱 | 午夜激情视频试看 | 男人AV资源网 | 校园春色~综合网 | 欧洲色色色入口 | 超碰日日爽| 成人免费电影网站 | 亚洲精品福利电影 | 国产精品无码午夜 | 日韩一道本社区 | 日韩免费在线播放 | 91资源在线| 成人论坛视频在线 | 人人爱夜夜操 | 91免费网址 | 欧美色干 | 结衣波多野快播 | 欧美日韩后入 | 欧美精品亚洲 | 青青草资源站 | 香蕉操比网站 | 伦理片视频 | 精品视频不卡 | 操碰日日| 国产免费豆花在线 | 国产日本韩国视频 | 四虎最新域名 | 91色老99| 欧美综合| 日本一级片免费看 | 欧美偷拍第一页 | 夜夜综合福利 | 69福利区| 在线三级A片 | 91自拍网站| 一区二区播放 | 在线免费不卡视频 | 国产福利在线 | 中文字幕免费看片 | 欧美肠交扩张另类 | 麻豆精品在线观看 | 国产欧韩日美一区 | 在线观看污网站 | 激情福利社午夜 | 国内三级视频 | 福利导航网站 | 黄色看片深爱网 | 91国产在线看 | 欧美性生爱 | 欧美在线伦理电影 | 五月天最新歌曲 | 国产久久久| 国产福利高清在 | 欧美视频播放器 | 日本伦理在线播放 | 理伦片免费| 免费+高清+无码 | 久久午夜福利电影 | A片网站在线看 | 91精品视频网站 | 国产美女炮机视频 | 国产在线资源网站 | 国产剧完整版观看 | 91香蕉在线播放 | 激情婷婷综合网 | 淫秽黄色毛片视频 | 国产欧美日韩电影 | 日韩大片足交 | 久久婷婷影视六月 | 在线看伦理电影 | 日日操夜夜操蜜臀 | 午夜色色影院 | 91绿帽论坛 | 宅男午夜网站 | 午夜视频资源 | 免费不卡视频 | 黑丝袜自慰喷白浆 | 国产激情影视综合 | 91p最新地址0| 91视频亚洲电影 | 国产成人午夜福利 | 日韩热视频观看 | 性插图福利影院 | 西瓜伦理电影 | 成人午夜性a一 | 欧美玉足足交 | 四虎性爱 | 夜夜福利导航 | 无码成人毛片 | 97操操操 | 日韩午夜无码影视 | 国产精品产品视频 | 日韩在线观看不卡 | 萌白酱国产在线 | 婷五月天在线草 | 日韩欧美在线视频 | 日韩欧美国产精品 | 成人性生活片无码 | 国产精品不卡 | 91看kan| 五月婷熟女 | 男人欧美午夜 | 另类日韩 | 激情综合网在线 | 青青草高清 | 欧洲福利视频 | 91超碰资源| 人妖网站综合 | 国产一级aa毛片 | 91视频亚| 狠狠撸综合网 | 日韩在线专区 | 亚洲成人aa | 欧洲精品黄片 | 囯产精品无码 | 足交在线一区二区 | 黄色网纸免费看 | 四虎最地址 | 三级性交毛片 | 国产在线观看三级 | 福利视频在线导航 | 福利导航av | 国产清草 | 丁香月视频在线 | 中文字幕日韩欧美 | 免费AV网站 | 中文字幕日韩亚洲 | 欧美性爱一级色图 | 波多野洁衣bt | 在线观看精品一区 | 在线日韩一区 | 伦理在线看| 欧美日韩在线看 | 日本免费一级片 | 欧美成人高清一区 | 日韩精品三级 | 国产美女一级视频 | 欧美a级片 | 欧美变态另类视频 | 国产在线青青草 | 日本在线视频二区 | 先锋影音人妖 | 欧美色图乱伦 | 国产不卡高清主播 | 三级片大全 | 午夜神马福利影院 | 欧美另类残忍 | 国产精品com | 乱码欧美孕交 | 欧美孕妇在线观看 | 夜色帮福利 | 国产高清对白 | 91青青青 | 国产91| 国产69 | 丁香六月天天 | 日韩插片| 欧美精品一区三区 | 亚洲水果 | 日本伦在线| 狼友深夜福利 | 国产91最新欧 | 91视频官网国产 | 欧美在线播放60 | 免费日韩伦理片 | 黑人性爱影院 | 亚洲国产精品91 | 国内精品午夜理论 | 中文字幕欧美在线 | 成年人免费在线 | 国产成人不卡 | 97小视频| 午夜视频福利免费 | 三级伦理电影网 | 亚洲欧美国产高清 | 操操叉叉操操 | 人妻精品久久久久 | 欧美一线a观看 | 亚洲一二三无 | 国产成人电影无码 | 麻豆色情热门吃瓜 | 小草莓视频 | 调教自慰福利 | 日本三级精油按摩 | 精品二区三区 | 亚洲成年人电影 | 欧美日韩性生活 | 91茄子破解版 | 欧美地址一二三 | 变态乱伦| 午夜福利18 | 国内精品一区二区 | 国产成年人 | 性欧美色色 | 日韩一区 | 国产精品大片在线 | 欧美三级福利片 | 三级av在线 | 欧美成人视频在线 | 青青草在免费线观 | 国产91蝌蚪 | 国内一区二区三区 | 午夜鲁丝无码视频 | 在线日韩欧美页 | 欧美日韩福利所 | 91网友自拍 | 高清欧美日韩 | 日韩电影天堂 | 东京热麻豆传媒 | 伦理香港| 国产在线奶奶色 | 精品国产日韩 | 久草小视频 | 欧美熟女六区九区 | 日韩在线三级 | 微拍福利影院 | 91性爱 | 日本高清xxx | 性爱AV天堂| 欧类AV怡春院 | 国产在线自拍 | 久久91| 成人片免费观看 | 久草福利视频导航 | 久久成人国产精品 | 加勒比无码视频 | 日本高清视频一本 | 炮炮视频A级成人 | 日本h在线播放 | AV日韩一区二区 | 国产在线激情视频 | 国产视频一视频二 | 另类欧美色图 | 成人影片网址 | 欧美福利在线一区 | 三级黄色网址 | 日本AV中文电影 | 国产传媒激情精品 | 成人免费视频视频 | 夜夜干天天 | 日本簧色三级网站 | 日韩精品p | 免费网站成人 | 日本久久免费在线 | 午夜视频福利导航 | 狼友导航 | 日本韩国三级观看 | 亚洲肏逼视频66 | 三级黄色网址 | 谁有A片网址 | 人妖另类视频1 | 午夜丁香激情二区 | av天堂大片| 日韩激情影院一区 | 人妖另类综合 | 国产女人夜夜做 | 国产日韩精品一区 | 国产精品黄在线观 | 在线国产福利视频 | 国产综合在线观看 | 国产精品黄色 | 欧美日韩高清免费 | 免费日韩高清无码 | 欧美五级片 | 日韩亚洲欧美在线 | 国产一区1635 | 狠狠艹艹艹艹 | 青久在线 | 三级网站视频观看 | 青青国产 | 无码中文字幕 | 日本三级黄页 | 免费无毒久久网络 | 亚洲区成人 | 国产精成人品日 | 熟女乱伦文学 | 欧美日韩爽不爽 | 国产无码啪啪 | 丁香五月天亚洲 | 夜夜骑青青草 | 日韩影院成人精品 | 福利国产视频 | 在线看国产黄色 | 欧美喷水影院 | 欧美潮喷十大潮喷 | 福利在线播放 | 成人生片18 | 家庭教师波多野 | 麻豆国产原创 | 91cao| AV黄色天堂网站 | 嘛豆免费视频 | 偷拍第14页 | 四虎天堂色 | 美女内射WWW | 理论片在线观看 | 精品欧美在线精品 | 孕妇三级片 | 欧洲视频在线 | 久久国产精品影视 | 中文字幕国产不卡 | 一区欧美| 男男色网男男视频 | 日本欧美在线观看 | AV黄视网站 | 日韩成人短视频 | 国产免费人人看 | 四虎公告| 欧美极品在线 | 国产a级片0 | 极品AV | 成人软件视频 | 波多野洁衣影音 | 91社区论坛 | 国产久RE热视频 | 欧美精品日韩精品 | 日本韩国免费电影 | 国产二级视频 | 精品破处在线 | 免费黄色无码网站 | 欧美另类色图 | 日日夜夜天天干 | 国产成人免费的 | 成人三级在线电影 | 91短视频网址 | 国产免费播放器 | 国产在线观看影院 | 成人国产免费 | 超碰香蕉亚洲香蕉 | 丁香五月桃花网 | 亚洲宅男av | 97碰碰资源总站 | 无码一区二区四区 | 久久99国产| 91吃瓜ht国产| 欧美成人777a | 91午夜福| 日本韩国免费电影 | 国产福利观看 | 国产精品大片在线 | 黑丝喷水自慰 | 日韩最新网址 | 91亚色TV| 啪视频免费 | 国产微拍精品一区 | 国产精品无码成人 | 久草资源福利在线 | 日本韩国三级观看 | 亚洲经典在线 | 三级片俄罗斯 | 日韩无码 | 国产校花在线播放 | 日本在线视频看看 | 国产内射后入在线 | 国产一区二区香蕉 | 歐美福利一區 | 美女操逼福利社 | 91人人澡人人 | 丁香五月天导航 | 欧美福利一二三四 | 爱豆传禖免费观看 | 欧美性爱福利网站 | 午夜福利偷拍视频 |