Wu Lai came to a world he had never seen before.
This place is built up with towering walls one after another. You have to raise your head hard to see the top.
People inside the wall are at ease and can see the blue sky when they raise their heads.
But no matter how hard you try to look outside, your view will be blocked by this wall.
Wu Wei stopped a person, "What's outside the wall?"
The man looked horrified, shook his head, and ran away.
Purpose: Live hard
