Kin-Wai Ng is a social activist raised in Yuen Long. In 2019, after the "721 Yuen Long attack," Ng formed Tin Shui Wai Connection to contest the 2019 District Council election against the pro-Beijing incumbents. He ran against Lee Yuet-man in Kingswood North in the election and won the seat.

In 2020, he ran in the pro-democracy primaries for the 2020 Legislative Council election. He came fourth in New Territories West and secured the nomination to run in the general election, which was then postponed by the Hong Kong government.

On Jan. 6, 2021, Ng along with 54 other pro-democracy candidates was arrested for organizing and participating in the democratic primaries.[1] He was one of the 47 who are charged with subversion under the National Security Law on Feb. 28, 2021. On March 11, 2021, as the court revoked his bail, Ng chanted his election campaign slogan with the supporting crowd. On Feb. 6, 2023, Ng pleaded guilty to the charge: "My Lord, for failing to subvert an authoritarian regime, I am guilty––I plead guilty to the charge."[2]

Ng had been a proactive member of the Yuen Long district council to establish an investigative working group on police brutality and abuse of power in the 2019 Yuen Long attack. In less than two months, the council passed the motion to establish the working group, in which Ng sat as the vice-chair. In July 2020, Tin Shui Wai Connection led a march to Yuen Long Police Station, calling for a thorough investigation of police misconduct during the Yuen Long attack. Four protesters, including Ng, were arrested. On May 8, 2021, Ng pleaded guilty to organizing a prohibited group gathering and was ordered to pay a fine of HK$10000.[3]