So it appears we were right in claiming the WS-10A/x not making its way onto J-10 in the past was indeed because PLAAF wanted 10 or so years of proven reliable service of WS-10A on J-11 before allowing it on a single engine fighter. I don't believe these WS-10 are too different from the WS-10A or whatever the latest variants are on Sino-flankers. That condition from PLAAF combined with a relatively limited production rate.
So it appears China did in fact totally master the design and manufacturing of high thrust turbofan back around 2012. WS-10 isn't a 2020 success story, it's a ~2010 success story just proven now. All those haters and trollers can eat it but they're probably wallowing in a world of delusion still. Of course this isn't to say a WS-10A/x is equal technology to something like a F110, especially when it comes to MTBO and lifespan.
Doesn't have to be equal to the F110 right now. But the important thing is that it is in production and being actively equipped which, allows the supply chain to improve and optimize their production technology. Every country knows the formula to the metallurgy required for turbine blades, but not every country has the manufacturing capability to produce them.
As long as we have this engine in production, even though it cannot be equal to the F110, it is only a matter of time that the industry gains enough experience to improve this engine. Additionally, once the basic supply chain is built up, the development time for the next generation engines such as the WS-15, WS-20, etc. will become shorter.