I am not saying this to instill flame in this forum. I acknowledged that the Chinese had come a long way and is no longer the third world country as seen in the 80s. Their aerospace industry had also been very very rosy. However, I would not go so far as to say that the Chinese had surpassed the Russian and European countries in term of engine developement and manufacturing sector.
Look, China started off pretty late (not that it is of any problem) and the Europeans and Russian are already up and going. Up till now, I am only seeing that the WS-10A engine which shows promises and had been equiping their fighters in masses and so far no report of any problem yet. The WS-15 are still in developement, no one know how good that engine is until it had reaches mass production and was fitted in the fighters and fly for a while...
The European on the other hand are coming up with great engines... look to Roys Royce and the already mentioned companies. Also brought up by Mig-29 - the civilian A380, which had no equivalent in China (although China did take part in building some of the components and subassembly like the wings section).
As to Russia... their economic had been in a sham for decades after the break up of Soviet Union, but their technology base was still very very strong. And the recent introduction of the T-50 which make use of almost totally Russian technology (including the engine department) and also the Su-35 (which also used their own engines) is proof enough that the Russian are still going strong.
The Chinese even with their latest J-21/J-31 or F-60 prototype might use Russian engines to fly first. So if the Chinese are that confident in their own design, I couldn't figure out why they needed to do that... the few explanations I can find is that the Chinese still didn't have an engine that they are confident in, or that the Chinese are aiming this aircraft for export and the target market are those customer that are flying Russian aircrafts and had assess to the Russian engines.
So in conclusion, I am a watcher, I would tend to wait and see the progress of the Chinese aerospace industry first for a while longer, before jumping in and declare that the Chinese are already up there... surpassing the European and Russian... At the most, I think they might be on par in certain areas as compared to the European and Russian... but to surpass them... the Chinese still have some distance to cover.