Warriors Two (1978)

Wah, a bank cashier, uncovers a plot to kill the mayor and take control of his village. When his warning is stopped, he is nearly killed, and his family is shattered by the violence of the attackers. Rescued by a mumbling Shaolin disciple, Wah is brought to a kung fu master who trains him in the powerful art of Wing Chun, preparing him to face the brutal men threatening his home.