Ye Cheng pulled Meizi back from the front of the wall. After a few steps back, he found that the compass was slowing down and the sharp voice disappeared. He grabbed the compass and took the beauty behind him, then slowly approached the wall again. Sure enough, the pointer moved by itself, the closer it was to sound and speed, the stronger it was.

The wall is really out of order!

Ye Cheng squinted. He grabbed Miko's wrist and came to another wall. No matter from which angle he tried, the compass did not respond.

Like most air-raid shelters, it's very square. One side is the entrance and the whole...