What is the name of this 1985 Hong Kong comedy horror film directed by Ricky Lau and starring Lam Ching-ying as a priest?
Lam Ching-ying: Lam Ching Ying (; birth name: Lam Gun-bo 林根寶; 27 December 1952 – 8 November 1997) was a Hong Kong stuntman, actor, film producer, action director and director. Lam Ching-ying:  A physically talented and graceful martial artist, Lam was best known for playing the stoic Taoist priest in "Mr. Vampire" (1985). Mr. Vampire: Mr. Vampire is a 1985 Hong Kong comedy horror film directed by Ricky Lau in his directorial debut, and also produced by Sammo Hung.
Mr. Vampire