The Incredible Kung Fu Master

The Incredible Kung Fu Master, also known as The Kung Fu Master is a 1979 martial arts action comedy film directed by Joe Cheung in his directorial debut and starring Sammo Hung and Stephen Tung, the latter in his first leading role. This film features an action direction from a number of famous action directors including Sammo Hung Stunt Team, Lam Ching-ying, Billy Chan, Bryan Leung and Yuen Biao.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.