Hero of the Wild (1977) on Netflix

Plot summary

Tu Ta Shen holds a regional martial arts title and works as an assassin bound by honor. He challenges the leading fighters along the road to Nan Pa Tien, who holds the other title, aiming to unify both championships. One man he defeats cannot bear the shame and takes his own life. Dying, that man asks Tu Ta Shen, whose honor he acknowledges, to bring down the Manchu supporters that Nan Pa Tien leads. The man's son attacks Tu Ta Shen and is beaten. Tu Ta Shen offers to train the boy so he can avenge his father, and the two of them set out together.