After the death of Fang Zhimin, chairman of the Military and Political Committee of the Red Ten Corps, former propaganda officer Yang Weishan and company commander Pei Hanyue gathered Red Army survivors to form a Red Army guerrilla group in Mopan Mountain. After the outbreak of the Anti-Japanese War, former Red Army Political Department Director Zhao Chuan was ordered to go up the mountain. After conveying the order for the guerrillas to go down the mountain to reorganize, Yang Weishan regarded him as a traitor and killed him. Therefore, Pei Hanyue personally went down to the headquarters of the New Fourth Army to understand the situation. He learned that the Red Army's reorganization was an order from his superiors, so Yang Weishan and Pei Hanyue accepted to lead the troops down the mountain. Adapted, but was attacked by the Kuomintang army, Pei Hanyue was seriously injured, so Yang Weishan personally went down the mountain to buy medicine, and shot the chief of staff of the Kuomintang army by the way. Later, the Kuomintang army encircled Mopan Mountain and was eliminated by the guerrillas by taking advantage of the favorable terrain of the Lost Soul Valley. Later, Yang Weishan Chen Mingchao, the reconnaissance section chief of the Weishan faction, led his team down the mountain to establish an organization and outsmarted the National Army's military supply depot. Later, the guerrillas participated in the battle to annihilate the Japanese invaders. However, they were attacked by the Kuomintang army on their way back to the mountain. Chen Mingchao and his team died heroically. After returning to the mountains, the guerrillas were in trouble due to lack of medical treatment and food. The Kuomintang army once again besieged Mopan Mountain. Due to the traitor's betrayal, the guerrilla suffered a heavy setback. Yang Weishan jumped off a cliff and died, and Pei Hanyue was also injured and betrayed by the traitor, and was captured and sacrificed.
