What are the shortcomings of Ching-Ying Lam's acting skills?

Ching-Ying Lam was strong and upright all his life. He is impressive and gives the impression that he is rather old-fashioned, so few people dare to play jokes on him. He is so serious that everyone is afraid to go near him. He is a very serious person. He created a beautiful era of classic zombie films, and Ching-Ying Lam's contribution to Hong Kong zombie films will never be erased. His image as a zombie leader is deeply rooted in the hearts of the people.