Martian,
J-10B 1035 is indeed equipped with WS-10A, and we have seen it flying since 2011 as I recall.
In two year, assuming it test flies 5 hours per week, it would have only accumulated 540 hours on J-10B 1035.
I honestly would prefer 1000 hrs of flying record at least before mass deploying WS-10A on J-10Bs since the aircraft sports just one engine, and reliability is crucial. I believe that the engine is maturing, but it would be more prudent to delay the deployment on J-10B for a couple more years unless we are facing immediate war scenario. I am sure CAC is thinking similarly.
Why restrict WS-10A testing to just a single J-10B?