Twelve-year-old Hai Wa sends a secret letter containing Japanese military information to the Eight Route Army during the anti-Japanese war.
Cai Yuanyuan
Anan Cai
Shu Shi
Jiang Rui
Baoluo Li
Fei Liu
Li Ma
Yong Li
Feng Xiao
Boxun Zhou
Cheng Zhi
Yu Mingde
Lan Wang
Cao Duo
Gongmin Yang