Can China Kung Fu be used in boxing and Taekwondo?

The Olympic Games is a sport, not actual combat.

Any fighting skill will lose its lethality more or less in sports competitions, of which the better ones are preserved, such as boxing, and a few are preserved, such as martial arts routines.

As for applying China Kung Fu to boxing and Taekwondo, that would be disgusting. It is not desirable from the point of view of sports or actual combat. From the point of view of sports, each has its own laws and cannot be confused! In actual combat, in short, all the techniques in boxing and taekwondo are embodied in China Kung Fu, so there is no such thing as "using China Kung Fu in boxing and taekwondo".