After a fierce battle in the plains of Gansu, two injured survivors, a young trumpeter and a girl of the Woman Pioneers, wander in search of their comrades. They are eventually joined by an Yugur girl who has lost her family.

First part of the Decisive Engagement trilogy. Directed by Pingfen Li et al.

In 1927, Shanghai was shrouded in white terror. On the day Communist Party member Jian Hua was killed by the enemy, his son was born. The leader of the underground party transferred his wife Min Wen to the Soviet District, and entrusted his son to the worker Gu Argen for adoption, naming him Xiaoliang. After several twists and turns, Xiao Liang was adopted by an official family. At the age of 10, Xiao Liang learned of his own background and fled to Shanghai to find his mother. Min Wen also happened to go to North Jiangsu to pick up Xiao Liang, but Xiao Liang was no longer there. Xiao Liang was found wandering on the street by Gu Argen, and he led him to Wuhan with refugees. He was blown up halfway through the journey. With the help of a wounded soldier, Xiao Liang arrived in Wuhan and became a Xiaobalu.