C270 Anterior and posterior pincers

Judging by the width of the entrance to the path, it must be 50 to 60 cm wide. The fatter the person was, the more likely they would have to turn sideways.

Although Captain Liu was not fat, he was the type of man with a well-built body. He was the first to enter the small path, his shoulders were almost touching the stone walls, and there were a lot of dark green moss and the like on his clothes