The Informer (1980)
Original title: 金手指
The Informer is a 1980 Chinese-language action movie directed by Wong Chung, with a running time of 1h 39m. It stars Wong Chung, Danny Lee Sau-Yin and Lam Shung-Ching.
Wang Chung plays the standard level-headed cop in charge of a rag-tag bunch of misfits and stereotypes (the coward, the playboy, etc.) who are after a drug runner. After their informant is killed, the team turns to a former Triad member (Danny Lee) to infiltrate the gang and bring the big boss down.