Sang Gong Kei Bing 4 (1990)
Long Arm of the Law IV / Long Arm of the Law: Part 4 / Underground Express / Sheng Gang Qi Bing 4: Di Xia Tong Dao
Raiting: 
- /10
Genre: Action
Director: Michael Mak
Stars: Elvis Tsui, Jacqueline Ng Suet-Man and Frankie Chin Chi-Leung
Country: Hong-Kong
Release date: 5 June 1990
Length: 100 minutes
