Before the shelter was completed, Chen Zhou and Paul had to stack the felled trees and first build a small shack to sleep peacefully.
Otherwise, Chen Zhou might have been fine, but Paul, with his poorer physical condition, could not sleep and was at risk of catching a cold again.
This situation persisted until Chen Zhou finished trimming the edges of the pit, chiseling out a neat rectangle, and started stacking stone walls on both sides, which slightly improved the situation—
Although the shelter had no roof at this point, and the stone walls on both sides joined by the weight of stones still let wind through, they could at least resist much of the cold and prevent rapid loss of body heat.
