Double Crossed (1988)

Uncle Bill (Tung Piu) and his nephew (Hung Leung Shek) have worked in many odd jobs. The two lead a comical and adventurous path hustling their way from one amusing scenario to another. The nephew on underground boxing matches to raise money for his wedding but loses. In an attempt to recover the money he lost, he resorts to fighting for money. After losing again, his only recourse is to have Uncle Bill train a top fighter (Bruce Leung) with hope of retrieving his money and more.