Russian experts declared: " China must catch up with the Russian Aviation and Technology nervous . " Since 1992 , China and Russia signed the agreement to introduce SU27SK fighter series . Direct purchase from Russia, China, which finished fighter SU27SK total of 72 batches of about 3-4 . These aircraft will be used to direct tactics deployed in the People's Liberation Army Air Force . Second, the contract also covers about 200 contract production SU27SK fighters. Total value of the contract amount of about 25 billion U.S. dollars.

But as of 1996, before the introduction of the Russian production lines in China does not produce enough SU27SK fighters. In 1996, China developed its own domestic version of SU27 / F- 11 fighters gradually onto the stage . The report pointed out that in the original production , Shenyang Aircraft Corporation quoted some parts of Russia sets . Then began domestically.

And as of 2003 according to incomplete statistics, China's Air Force already has all kinds of SU27 fighter 95 . At that time, only count as Russia was " a " is AN31FN engine license the production of the series . Also because of this, Chinese manufacturers have to accept the engine from Russia AN31FN reality. This greatly limits the Chinese SU27 / F- 11 mass production work. Seriously delayed and therefore the pace of the Chinese fighter updates .

In 2004, China suddenly pull off the Russian proposal , refused to accept the Russian offer of a new SU27 fighter aircraft and related equipment. Russia during the internal analysis that this is mainly due to the high-end Chinese fighter jet parts and components manufacturing and production, was already sufficient to meet the progress of the Chinese air force fighter jets and demand . Therefore, to only save foreign exchange resources. So pull off the Chinese to accept the Russian finished fighter.

In the time shortly thereafter , the Chinese have once again broken through the years, serious constraints and delayed the development of a Chinese fighter " turbofan "system. This makes China the ability to feel once again the engine completely out of Russia in China in terms of limitations and constraints. But Russia's state arms exports is responsible for management staff , said that this point we can fully understand the Chinese mentality. He then talks with the Russian media, admitted : "SU27 fighter plans to introduce China's manufacturing technology allows to improve the component manufacturing and R & D capabilities , I think this ratio of at least 70-90 %. "

China 2006 exhibition and the first WS10 way to start then quickly transferred to the PLA Air Force . This is used instead of the more large-scale production of AN31F engine. The Chinese already in the 50 years after the former Soviet Union for a number of imitation weapons , save a lot of experience. people are very familiar with the Russian manufacturing technology and processes. Therefore, the successful development of the engine mean that Russia had set up a barrier to China's last loss . Although the WS10 in some specific technology, has not reached the military needs or need some improvement. But international politics from the Russian Research Center of geopolitical horse Quillen Branch Constantine said that if Chinese people really intend to carry out a comprehensive variety of large-scale SU27 fighter manufacturing, then the Chinese products will soon fill the entire Southeast Asia and Africa, the Arab The world and other markets. With the export of Russia's two largest air force equipment , su27 and su30 will be at risk or impact.