Cheng Zhai chu lai zhe

Purely from a historical perspective, this film offers so much insight into pre '97 Hong Kong in a way that other Hong Kong movies don't. The reason for this is its setting within the Kowloon walled city, a structure that is (thankfully) no longer in existence. From a cinema perspective, the movie carries most of the similar tropes as other pieces of Hong Kong cinema does from this era and includes some very real family relationships. I would definitely recommend watching this film if you can get hold of a copy (its on Youtube).