Long Arm of the Law IV: Underground Express

省港旗兵第四集：地下通道

Also known as Long Arm of the Law IV Underground Express (1990), Underground Express, Long Arm of the Law IV, 地下通道, 省港旗兵四

A group of Hong Kong criminals are hired to rescue student protesters fleeing mainland China. Caught in a political tug-of-war, they must evade ruthless mainland authorities pursuing them at every turn.