But now Chinese quality is very good compared to a decade back atleast better than Russians for now and also better than ours as we have not mass produced anything
That is the philosophy in Chinese manufacturing, quality comes after you have begun building in quantity. You cannot get good at building anything until you built lots of it.
China sees this more than other nation because of the pressure the US puts on it.
It is not only the quality of US systems that is scary but the massive quantity of it. The USN had 60 DDGs in 2012 when China had exactly 6 052Cs! Back then, the quantity gap looked as hopeless as the quality one.
Even today the US has 11 carriers when no one else has more than 2. But at least the DDGs ratio is no longer as bad.
But as long as the production lines are running, the numbers will even out and the quality will get better year after year with more ships you build.