[2] Ch'ng was born in 1934 in Hui'an County, Quanzhou, China and moved to the Straits Settlements (present-day Singapore) in 1935.

[6] In the 1972 general election, he contested for MP of Tiong Bahru Single Member Constituency again, against Seow Yong Chew from Workers' Party (WP) and Richard Lee Kah Chit from United National Front.

In the 1976 general election, Ch'ng contested for MP of Tiong Bahru Single Member Constituency again, against Teo Kim Hoe from United People's Front, winning with 83.10% of the vote.

[7] In the 1980 and 1984 general elections, he remained as the MP for Tiong Bahru Single Member Constituency after getting uncontested walkovers.

They won with 57.84% of the vote against the WP's group of Low Thia Khiang, Lim Lye Soon, and Gopalan Nair.