Tsui studied journalism at the Chinese University of Hong Kong and received a scholarship from Star TV in his final year in 1995.[3] After graduating, he became a staff writer for the South China Morning Post, and transitioned to Oriental Daily News as a political writer in 1997.[4][5] He later returned to the South China Morning Post as a film editor and contributed to the Post from 2005 to 2012,[6] before joining The Hollywood Reporter.[7] He served as the Asia bureau chief for THR until August 2013, when Clifford Coonan took over the role, and became a senior film reviewer for THR.[7] Due to his background as a political journalist, Tsui explains that his film reviews are more rooted in cultural and social commentary rather than "solely aesthetics or film theory".[4] In 2016, he curated a documentary screening series on the People's Socialist Republic of Albania for the Cinéma du Réel at the Centre Pompidou in Paris, France.[8] Tsui later left THR and returned to the South China Morning Post as a columnist on Sinophone cinema before 2019.[8] As of May 2019, he was teaching journalism and film at the Chinese University of Hong Kong.[8]
In July 2019, Tsui succeeded Gary Mak as the director of Broadway Cinematheque.[6] His first project was serving as the artistic director for the 16th Hong Kong Asian Film Festival [zh].[9] During the COVID-19 pandemic, Tsui introduced a remastered classics screening program at the Cinematheque.[10] He also served as the curator for the Three Continents Festival at Nantes in 2023 and 2024, which featured retrospectives on Hong Kong filmmakers Derek Yee and Ann Hui respectively.[11][12]