C40 I Was Thinking about Something

Black Stone Mountain was a high road far away. Heavy machines couldn't be transported here. If they had to rely on manpower to repair the road, how long would it take for them to reach the 80 mile mark?

He thought hard, unable to sleep at night, tossing and turning, making Guilan in bed all night long sleepless.

Gui Lan pushed him and said, "Jin Gui