The expansion of communism in Sibu relied heavily on student movements in several schools such as Chung Hua Secondary School (中华中学), Catholic High school (公教中学), and Wong Nai Siong High School (黄乃裳中学). Some of the communist strong points in Sibu were at Oya road and Queensway (now Jalan Tun Abang Haji Openg). The movement was also supported by the intelligentsia and workers in Sibu. For example, Dr Wong Soon Kai supported the movement by supplying free medication. Kampung Tanjung Kunyit villagers were among those being harassed into providing food and medical supplies to the communists. On 30 March 1971, the communists launched an anti-porn movement. In early 1973, they launched another campaign which opposed tax increase and inflation of prices while endorsing an increase in workers' wages. Some of the communist volunteers would start to distribute pamphlets at shophouses, schools, and the wharf terminal. The group also started military operation against police stations and naval bases. Communist guerillas would behead anyone who was suspected of being a government informant. The town was put under on-and-off 24-hour curfews for several months.