The Yanan faction (연안파, 延安派) were a group of pro-China communists in the North Korean government after the division of Korea following World War II. The group were involved in a power struggle with pro-Soviet factions but Kim Il Sung was eventually able to defeat both factions and dominate the North Korean government which allowed him to push for unification during the Korean War. "Yenan" is the Korean reading of Yan'an, a town in China that formed the base of the Communist Party of China during the Chinese civil war.
Korea, Vietnam and US Foreign Policy 1945-75, Christine Bragg ISBN 0-435-32708-9