Johnny Wong is the main antagonist of the 1992 Hong Kong film Hard Boiled. He is traid boss who ruled Hong Kong whose gang killed Det Yeun's friend caused him to revenge. Johnny discovered that his henchman is actually is undercover cop.
Towards the end of the film at a hospital, he holds all the patients, police officers, and staff hostage and he kills patients who try to escape. He shoots at officers who are trying to evacuate babies. He shoots at a crowd of patients standing between him and his enemy. His henchman Mad Dog shoots him for this, so he kills Mad Dog.