Three members of the Young Pioneers search for the source of a rare piece of ore.
Wang Shaoping
Xiao Yong
Li Daojun
Da Yong
Yiqin Zhou
Cai Hua
Deng Nan
Uncle Xu
Shiming Zhi
Mother
Zhang Yi
Old Grandpa
Zhou Zhiqing
Zhang Meng
Da Shichang
Girl Hei ‘s Father
