If Lieutenant Chow Yun-fat is corrupt, Detective Mark Wahlberg is so idealistic he causes problems for the NYPD’s Asian-gang unit as it investigates the murders of innocent immigrants exploited by rival crime syndicates in Chinatown. There’s tenderness, humor, a gratuitous body double, and splashy lighting in this ho-hum action drama, which takes itself at times too seriously and at other times not seriously enough. James Foley directed a screenplay by Robert Pucci.