 In 1960, there were 18 high schools using Chinese as the medium of teaching and 22 high schools teaching in the English medium in Sarawak alone.In the year, the British Crown Colony who were then in control of Sarawak proposed that the 18 high schools using Chinese as the medium of teaching be converted into using English.In 1961, a letter was sent to all of the Chinese-medium high schools demanding them to convert teaching of all subjects into English before 1 April 1962.