Trick Wei Wenzhong

Adagio Swift divided the eight people into four groups, each with two people.
Four groups of people created avalanches in different sections of the mountain.
The group that came back were You San and You Wu.
They created the avalanche near the entrance of Death Valley, which was closer to where they were camping, and were the first to return.
Youwu was injured.
The main reason was that he underestimated the power of the gunpowder bag when lighting it, ran too slowly, and was injured...