IIRC the Vietnamese kicked the Chinese’ butts on both land and air battles in the late 70’s. Although the Chinese had the aftermath of the Cultural Devolution going against them.
.......my only recollection of any Chinese Army victories against anybody in the past 100 years was when they had a ten to one force....................like say the Marines at Chosin and I believe that was like 100 to 1 though I am not certain of that................