Just an interesting tidbit.
Ayi saying the J-35 is a step above the J-20 in terms of stealth.
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That is pretty much a given. STEM is always moving forward. The J-35/31 is smaller, so less surface area means less imperfections, and consequently, a lower RCS. There is no reason not to assume the PLA is constantly making advances in the design department such as in the case of generative designing, AI, RCS analyzing algorithms, better supercomputers, discovering more exceptionally talented people. They also probably made breakthroughs in manufacturing techniques to help achieve lower tolerances, increase composite strength and make new alloys, better riveting techniques, better RAM coating techniques that may or may not be inheritable by the J-20 etc.. All of which can potentially aid in producing a fighter jet that would have a lower RCS than the J-20. The lack of ventral fins and landing gear fairings such as the ones on the J-20, will definitely result in a lower RCS on the J-35/31.