Billy Lau acted in the film The Prince.

The film in which Billy Lau plays the guard is Mr. New Zombie. The guard was troubled by a strange disease, and his wife, Alian, invited Ying Zheng to be his master and apprentice. Because she was at odds with her rival Ching-Ying Lam in the early stage, and then the relationship eased, and she was lewd and lazy, but she was a good husband who loved her. ?

Mr. New Zombie tells the story of Ching-Ying Lam, a kind Taoist, who opened an altar to worship a spiritual baby who was aborted by his mother and could not be reborn because of physical destruction. Most of the spiritual babies on the altar are innocent and lovely, but three of them have miscarried repeatedly, full of hostility and evil. Dao Yuanming's disciple Anthony Wong and infant spirits's puppet were sent to the school sister Sugarcane Gu for support, but they accidentally released the evil spirit baby that had not been cultivated yet and attached it to their old lover Lianmei. Lianmei married a warlord who was troubled by a strange disease, and invited Ying Zheng to be a master and apprentice. Ying Zheng inspected the tomb of the warlord's family and learned that the warlord's father had turned into a zombie, and ptomaine was harmful to his children. On the other hand, Ying Zheng happened to find the evil baby in Shuaifu, knowing that it had changed, so she hurried to find it.