Set in the Chinese Civil War, Guangxi, a southwest China province. Three teenagers must send a secret letter to the guerrillas in ten days.

In the mid-19th century, at the height of the Opium War, the Chinese people rose up against the feudal system and the Manchu dynasty, which had capitulated to foreign invaders. ... With their heads bowed, peasants in chains trudge along, those who refused to give money to crush their rebellious brothers. Suddenly, their path is blocked. It is Song Jing-shi who has come to their rescue with his detachment. The freed peasants joined Song Jing-shi. This is how the core of the Black Flag Army was formed. The first historical film made in socialist China in the 1950s. The script is based on authentic material collected in villages in Shandong Province. Legends about the cruelty of Sen Gelinzin and the bravery of Sun Jing-shi, who is called the "Chinese Spartacus," still live on among the people.

Kind people help bring little Lan-Lan and her brother Dong-Dong to Beijing to their parents.

Based on the story of Li Zhong about the struggle of Chinese volunteers on the Korean front on the side of the North Korean defenders of the homeland. In the center of the film is the family of the deceased volunteer Yong Qing.

Based on the drama of the same name performed by the Shanghai Youth Repertory Troupe, the film tells the story of the underground CCP member Yu Haitao, who used the alias of Zhang Gongfu, and was active in the Shanghai economic circle as a businessman, fighting against KMT agents and crushing the enemy’s secret plans.