Red mandarin dress

the long version

Shanghai is terrorised by its first-ever serial killer. The murderer dresses his victims' corpses in fancy red mandarin dresses before leaving them in public places. Insp. Chen Cao of the Shanghai Police Department has taken a step back from his professional life to pursue an advanced literature course instead of investigating a politically sensitive corruption case, but now he must return to active duty and help in the manhunt. He learns that the symbolic garb may be connected to the corruption scandal, but not before a young female officer falls prey.