First of all, let me correct you. Chinese Kung Fu is the general term for foreigners’ understanding of Chinese martial arts and martial arts. In China, there are only martial arts and martial arts. One is external and the other is internal. Wushu is for performance, and martial arts is for killing. There is no comparison.
Foreigners know that Chinese martial arts are powerful, so they use them as a form of performance. Real martial arts only exist on the battlefield and among the people.