八路軍
Gu Qing, a soldier from the propaganda department of the CCP (Chinese Communist Party) Eighth Route Army in CCP-controlled Shaanxi, travels alone from Yan'an to the northern KMT-controlled area of Shaanxi, Shanbei, in the early spring of 1939, with the task of collecting the peasants' folk songs in order to re-write them with communist lyrics in order to boost the morale of the Eighth Route Army soldiers.