City on Fire (Chinese:龍虎風雲;Simplified Chinese: 龙虎风云, Pinyin: Lóng hǔ fēng yún) is a gritty and stylish 1987 Hong Kong action film produced and directed by Ringo Lam, and starring Chow Yun-Fat, Danny Lee and Sun Yueh. Following A Better Tomorrow (1986) it helped establish Chow's popularity as an action star in Asia, and to a lesser degree, the West.

An undercover cop, played by Chow Yun-Fat, infiltrates a gang of thieves who plan to rob a jewelry store. The film shows how he infiltrates the gang. Written by Kale Whorton