During an interview at Zhuhai Airshow 2012, Vladimir Barkovsky, deputy general director of the Russian Aircraft Corporation MIG and head of its engineering center named after Artyem Mikoyan, confirmed that the indigenous designed J-31 fighter, which recently flew for the first time, uses a pair of Russian Klimov RD-93 turbofans.
Sergei Kornev, head of the aviation department of Rosonboronexport, reported at the show that Russia has sold to China the documentation on
overhaul and lifecycle support of the AL-31F series engines and helped it establish a well functioning system for keeping them serviceable.
On whether, Russia has assisted China's WS-10A engine, Kornev answered that Russian specialists have not been briefed on its design and that Russia has never delivered AL-31F design documentation to China.
He also confirmed that 100 RD-93 engines had been delivered to China, which are primarily used to power the JF-17 fighter.