Хенг Самрин
Sovan was a founding leader of Kampuchean United Front for National Salvation (KUFNS or FUNSK) on 25 November 1978. He served as Secretary-General of the Kampuchean People's Revolutionary Party from 5 January 1979 to 1 December 1981, when he was replaced by Heng Samrin following his removal from office by the Vietnamese.