During the 1967 labour disputes which later turned into Hong Kong 1967 leftist riots, Pang opposed the pro-Beijing leftist workers' intimidation to young workers to join the labour strikes on 29 May.
He urged the workers to report for work the following day with the assurance that government protection would be sought for them against the intimidators.
In the 1985 Legislative Council election in which direct elections were introduced for the first time, Pang won a seat in the two-seat Labour constituency carefully designed by the colonial government to maintain the balance of power between the pro-Taipei and pro-Beijing unions.
Pang was elected uncontestedly alongside Tam Yiu-chung of the pro-Beijing Hong Kong Federation of Trade Unions (FTU).
He was lobbied by Allen Lee, chairman of the Liberal Party who tabled an alternative proposal which was backed by Beijing in replacement of Patten's proposal, as well as Lu Ping, director of the Hong Kong and Macao Affairs Office.