1. Infernal Affairs: This is a crime thriller directed by Liu Weiqiang and Siu Fai Mak, which tells the story of a confrontation between an undercover policeman and an agent lurking in a gang organization.
2. The True Color of Heroes: Action Crime Movie is directed by John Woo and is famous for its wonderful gunfight scenes and excellent actor performances.
3. Blood Street: This is an action film with the theme of confrontation between police and bandits, directed by John Woo and starring A Xing and Tommy Tam.
4. The True Story of Teddy Boy: A Romantic Movie Directed by Wong Kar-wai tells the story of a pair of young people who love each other but have a tragic fate. Starring Leslie Cheung and Brigitte Lin, it is also considered as a classic Hong Kong film.
5. Xinlongmen Inn: A martial arts film directed and starring Jet Li, which is famous for its wonderful martial arts scenes and tense plots.
6. The Warlords: This is a martial arts film with a historical background, directed by Chen Musheng and starring Tony Leung Ka Fai and Maggie Cheung.
These are just a few examples of classic Hong Kong films. There are many other excellent films in Hong Kong, each of which has its own uniqueness.