As CGDK chairperson, Sihanouk unsuccessfully negotiated, over the next five years, with the Chinese government to broker a political settlement to end the Vietnamese occupation of Cambodia. During this period, Sihanouk appointed two of his sons, Norodom Chakrapong and Norodom Ranariddh, to lead the ANS. Chakrapong was appointed as the deputy chief-of-staff for the ANS in March 1985, while Ranariddh was minted to the twin positions of commander-in-chief and the chief-of-staff of the ANS in January 1986, replacing Tam. In December 1987, the Prime Minister of the PRK government, Hun Sen, first met with Sihanouk to discuss ending the protracted Cambodian–Vietnamese War. The following July, the then-foreign minister of Indonesia, Ali Alatas, brokered the first round of meetings between the four warring Cambodian factions consisting of FUNCINPEC, Khmer Rouge, KPNLF, and the PRK government over the future of Cambodia. Two more rounds of meetings were held in February and May 1989; since all were held near Jakarta, they became known as the Jakarta Informal Meetings (JIM).