Cheng Chung-tai (Chinese: 鄭松泰; born 5 November 1983) is a Hong Kong academic, social activist, and politician.

After winning a seat in the New Territories West constituency in the 2016 legislative election, he took over from Wong Yeung-tat as chairman of Civic Passion until the dissolution in 2021.

[4] On 5 January 2017, Cheng declared that Civic Passion would no longer participate in street protests and instead reorient itself to focusing on community work, and to restructure as a political party.

As reasons for this step, he cited the risks – several Civic Passion members had been arrested for their involvement in the 2016 Mong Kok civil unrest almost a year earlier –, as well as his view that current public opinion was not supportive enough of street protests.

[6] Cheng regarded the flags as "cheap patriotic acts" and alleged that the pro-Beijing bloc was ignoring issues of actual importance to Hong Kong people.