(Photo credit: AINOnline)
I just read Big New Chinese Order for Russian Fighter Engines at China Defense Blog, which quoted AINOnline:
China has placed additional orders for Russian AL-31-series fighter engines. State arms trade agency Rosoboronexport clinched two big contracts earlier this year...
To serve them, Salut has established partnerships with Limin Corp. and Tyan Li company in Chengdu on deliveries and manufacturing of spare parts for both the AL-31F and the AL-31FN. Russia has also agreed to provide all necessary maintenance and repair documentation to the Chinese partners.
To see China treats or will treat Western aircraft and aircraft engine makers, look no further than Russia.
The comments in the CDB post pointed me to this engine comparison for the J-20, which I sometimes mention in my classes. Essentially the Chinese appear to be testing two engines on the J-20, because they are not sure if they will use a Russian-made engine (or copy) or an "indigenous" engine (which is probably a copy of someone else's technology).