Full Happiness (1965)

Chi-keung and Bak Lan separated due to disputes, and Chi-keung took the younger daughter Siu-bo back to Macau while Lan brought the elder daughter Dai-bo to Hong Kong. While they both have partners, Lai-kuen and Jimmy, they still have ambivalent feelings towards each other. Siu-bo and Dai-bo bumped into each other during an occasion in Macau and decided to swap places to see their mum/dad whom they had rarely seen since birth. They were moved and persuaded their grandparents to reconcile with their parents. Despite warts and all, Chi-keung and Lan reunited and they all became a happy family again.

Unfortunately the movie Full Happiness is not yet available on HBO Max.