Chung entered the diocesan minor seminary of the Diocese of Laohekou in 1940.

However, in 1949, during the communist insurgency, the entire seminary was moved to Hong Kong and later to Macau.

[1][2] On 1 September 1970, Pope Paul VI appointed Chung as Coadjutor Vicar Apostolic of Kota Kinabalu and Titular Bishop of Acelum.

The Ecclesiastical Province of East Malaysia was established and Apostolic Vicariate of Kuching was raised to be an archdiocese and Chung became its first archbishop on 31 May 1975.

[3] On 21 June 2003, he retired and handed over the archdiocese to his auxiliary bishop, John Ha Tiong Hock.