He was inspired by Mao Zedong Thought when he was young and joined the pro-Beijing organisation Hok Yau Club in 1974, where he went on to become its president.

[4] He first contested in the 1988 District Board elections, where he initially considered standing in North Point, but switched with Chan Yuen-han and ran in Chai Wan, where he lost the Reform Club's Brook Bernacchi and nonpartisan Wong Ming-kuen.

He joined the newly established Democratic Alliance for the Betterment of Hong Kong (DAB), the flagship pro-Beijing party in 1993.

The party nominated Chung as the candidate for the by-election against barrister Audrey Eu who was supported by the pro-democracy camp.

In 2013, Chung was accused of making racist comments in a LegCo debate, during which he described foreigners as "flawed by nature", that they "knew nothing about Hongkong" and therefore were not fit to manage the West Kowloon Cultural District project.

He was surprisingly defeated by Chui Chi-kin, an "umbrella soldier" inspired by the 2014 Hong Kong protests almost unknown to the public before he was elected in the 2015 District Council election with 2,017 votes against Chung's 1,829 votes in Yue Wan, which ended his 25-year service as District Councillor.