Sâr left Beijing in February 1966, and flew back to Hanoi before a four-month journey along the Ho Chi Minh Trail to reach the Cambodian Marxist–Leninists' new base at Loc Ninh. In October 1966, he and other Cambodian party leaders made several key decisions. They renamed their organisation the Communist Party of Kampuchea (CPK), a decision initially kept secret. Sihanouk began referring to its members as the "Khmer Rouge" ('Red Cambodians'), but they did not adopt this term themselves. It was agreed that they would move their headquarters in Ratanakiri Province, away from the Viet Cong, and that—despite the views of the North Vietnamese—they would command each of the party's zone committees to prepare for the relaunch of armed struggle. North Vietnam refused to assist in this, rejecting their requests for weaponry. In November 1967, Sâr travelled from Tay Ninh to base Office 102 near Kang Lêng. During the journey, he contracted malaria and required a respite in a Viet Cong medical base near Mount Ngork. By December, plans for armed conflict were complete, with the war to begin in the North-West Zone and then spread to other regions. As communication across Cambodia was slow, each Zone would have to operate independently much of the time.