Wu Jiu nodded:
"This mission is not very difficult. A new mining area opened six hours ago, supposedly in some mountain range. We just received a report that a collapse has occurred, and twenty miners are missing."
The mining area is the white region, which is also the most extensive light mutation zone outside of the tower.
It's rich in resources, including the energy needed for the operation of the High Tower and the Blue Line Grass necessary for producing nutrition meals.
Because teleportation from the tower is random, it is always members of the Investigation Corps who first find the mining areas and ensure their safety before allowing bottom-dwellers to go there to extract resources.
However, it's not possible to guarantee absolute safety. There are too many bottom-dwellers. Suppose there are a hundred miners in a mining area, and each works for four hours. That's a hundred plus negative attributes.