 When her former partner Kap San reappears in her life, he reminds her that she was one of the child assassins who had lent a helping hand in killing Kuen's father.Lung Shing-fu (, meaning "dragon makes tiger"), portrayed by Philip Ng, is Kuen and Fung's rival.He is a trained fighter in Muay Thai, and is one of the walled city's most highly skilled martial artists.