[4] After Tjung returned to the Indies, he had worked at a telephone company and became a lawyer before being appointed as a deputy prosecutor in Pangkal Pinang's court.

[4] Additionally, he acted as a legal adviser to a Chinese school in Pangkal Pinang.

[4] Tjung was a proponent of the assimilation of Chinese Indonesians, and was critical of Yap Thiam Hien's writings on discrimination of the group within Indonesia.

[4] In the same year he was also a signatory to the manifesto "Towards voluntary assimilation" (Indonesian: Menudju ke Asimilasi jang Wadjar) published in Star Weekly.

[7] This manifesto, which may have been spearheaded by Ong Hok Ham, opposed the politics of integration advanced by Siauw Giok Tjhan and BAPERKI, which advocated for a distinct Chinese identity within a multiethnic Indonesia, and instead called for gradual and consensual assimilation into Indonesian society as a solution to ethnic conflict.