Cheung Po Chun was a goalkeeper when he was a footballer. He spent his youth career at numbers of clubs. In 1990, Cheung Po Chun was playing at
Sing Tao. He was promoted to the first team from the youth team. However, he didn't have too much chances after being promoted to the first team. In April 1991, he was selected to represent the
Hong Kong U-21 team as a third choice goalkeeper.
Chung Ho Yin and Lee Chun Fat was the first and second choice. In 1992, as he wanted to get first team chances, he decided to transfer to Michelotti. However, he had only played Michelotti for 2 games. In 1993, he chose to become a police. During his police career, he represented Police football team. == Coaching career ==