What are Chinese aircraft desgin and Airforce operational/combat doctrines?

Up to the mid-1990s the Chinese operated on a very 1950s era military doctrine and it’s aircraft design reflected this doctrine (e.g. J-8).

Obviously things have changed since 1990s.

The big question is how?

Operational doctrine
What is the PLAAF/PLANs operational doctrine?

How are it’s fighters meant to fight i.e. preferred method of engagement? E.g. BVR (ala F-22), WVR (ala MiG-29)

How are they controlled and how much initiative are pilots allowed to use?

What’s their relationship with ground and naval forces?

What tactics do they use? Are they similar to Russian ones or similar to Western ones or something uniquely Chinese.

What is their aircraft design doctrine?

Aircraft design tend to be based on the Air Force’s combat doctrine.

E.g. F-15/-16= combo was designed around USAF doctrines of highly maneouvrable aircraft in a hi-lo mix.

Russians did something similar with MiG-29/Su-27.

Or Tornado – primarily low level strike as well as recce and anti-shipping. Or Su-25/A-10 as CAS/tank busters.

Or F-22 and F-35 as an all stealth fleet.

The J-10s seem to be based on same design principles as F-16 (not surprising given Lavi heritage). That in itself doesn’t seem to fit with Chinese maritime policies or guarding China’s large borders where large longer ranged Su-27/J-11 are a far better choice.

J-21 seems similar.

JH-7 seems similar to a Tornado but is it meant to be low level or high level? Is it meant to be penetrating deep into enemy airspace or is it purely defensive.

PLAAF/PLAN still seems largely as an unknown force