Three members of the Young Pioneers search for the source of a rare piece of ore.
| Actor | Role |
|---|---|
| WWang ShaopingXiao Yong | Xiao Yong |
| LLi DaojunDa Yong | Da Yong |
| YYiqin ZhouCai Hua | Cai Hua |
 Deng NanUncle Xu | Uncle Xu |
 Shiming ZhiMother | Mother |
 Zhang YiOld Grandpa | Old Grandpa |
| ZZhou ZhiqingZhang Meng | Zhang Meng |
 Da ShichangGirl Hei ‘s Father | Girl Hei ‘s Father |