Brothers from the Walled City (1982)

When a gambling boss named ends up dead, he leaves his two sons, Chia Chin and Chia Kang in the custody of his good friend Chiptooth. While beset by temptations on all sides, Chia Chin tries his best to make an honest living for himself while his brother Chia Kang ends up running with the wrong crowd and gets into all sorts of trouble.