All's Well, Ends Well 1997

97 Ga yau hei si is a movie starring Stephen Chow, Raymond Pak-Ming Wong, and Roy Chiao. Lo King, a dependent playboy, fakes his own mental illness in attempts to inherit the fortune of his two older brothers, Lo Leung and Lo Fei,...
Old Mr. Lo has three sons and the youngest one Lo Kung is his favorite. However, Kung does nothing but fool around all day long. Old Mr. Lo is very annoyed about this. The relationship between father and son is thus affected. So on Kung's birthday, his two brothers decide to play a joke on him. They trick him into believing he has won the lottery. Kung is so happy that he spends a tremendous amount of money. When he realizes he is in huge debt, he pretends to go insane and the whole family believes him.