Xin jing wu men (1976)

Director: Lo Wei
Cast: Chan Sing, Cheng Siu-Siu, Henry Luk Yat-Lung, Jackie Chan, Liu Ming, Nora Miao, Suen Lam, Yi Ming

Synopsis:

A brother and sister escape from Japanese-occupied Shanghai to Japanese-occupied Taiwan, to stay with their grandfather who runs a Kung-Fu school there. However, the master of a Japanese Kung- Fu school in Taiwan has plans to bringing all other schools on the island under his domination, and part of his plan involves the murder of the grandfather.