http://www.freerepublic.com/focus/f-news/1543156/posts

Rosoboronexport, the state military export company, sealed a $500 million contract to supply China with jet engines of Moscow-based Salyut engineering plant. The engines will be installed on Russian Su-27SKM fighters assembled in China under the Russian license.

The contract of Rosoboronexport and China stipulates for deliveries of 150 engines of the AL-31F model developed for the Su-27/Su-30 jet series. The engines will be used for the assembling of Su-27SK fighters at a plant in Shenyang.
This is the third contract of Salyut on engines supply to China this year. Late June, the state arms export company signed a contract with Beijing to deliver 100 AL-31FN engines within 2 years for J-10, or Super-10, light fighters. The deal was $350 million worth. Experts estimate China’s need in AL-31FN engines at 250 items, which may bring Russia some $900 million. To all appearances, after China gets the first lot of 100 engines, it will sign a new agreement with Rosoboronexport.
Brian