There are many classic Hong Kong films that can be used as reference: 1 Infernal Affairs (2002): A gangster movie directed by Liu Weiqiang and Mak Zhaohui, with actors such as Andy Liu, Tony Liang, and Wong Qiusheng as the main characters. It tells the story of the struggle between an undercover agent and a gang leader. Sherlock Holmes (2004): Starring Hua Zai and Conan Doyle, this is the Hong Kong version of the Harry Potter film series, which tells the story of a clever detective solving a case. 3 "The Colors of Heroes"(1992): A gangster movie with Ma and Zhou Yong as the main actors. It tells the story of two brothers. The film has won many international film awards. 4. Carmen in Mongo (1997): The movie starred by Zhang Xueyou, Zhou Yong and other actors tells the story of a young man's pursuit of love. The movie is regarded as a classic of Hong Kong movies. 5 "The True Story of Hoodlum"(1994): A movie about dreams and love, starred by actors such as Zhang Guorong and Liang Jiahui. The film won many international film awards. The above are some classic Hong Kong movies with a strong Hong Kong flavor. I hope it will help.