In this Hong Kong name, the surname is Cheung. In accordance with Hong Kong custom, the Western-style name is Sam Cheung and the Chinese-style name is Cheung Ho-sum.
Cheung's employment history included working as a teaching assistant, research assistant, and university tutor.[1][11] He also earned commissions for his songwriting.[8] He originally planned to pursue a doctoral degree in the United States, but decided to stay in Hong Kong after the protests commenced in 2019.[5] According to Cheung, he made this decision when the protests sparked an emotional attachment to his home in Tuen Mun.[12]
On 6 January 2021, Cheung was among 53 members of the pro-democratic camp who were arrested under the national security law, specifically its provision regarding alleged subversion. The group stood accused of the organisation of and participation in the primary elections in July 2020.[19] Cheung was released on bail on 7 January.[20]