Without a source for that interview (is it even an interview?) The whole thing is worthless.
Taken from another site:
It seems that the Su-35 is considered possibly the most maneuverable fighter in the PLAAF at the moment, notable considering its TVC and that no active PLA fighter employs TVC.
The statement about KS-172 is what makes an overall very reasonable interview not without a grain of salt.Also, the statement about KS-172