C564 Sleeping Workshop
The air in the cave was not thick, and in the light the tunnel was cut smooth, three or four meters high and three or four wide. Even the ground was flat and free of dust.
It was obvious that the air here was not circulating, but the strange thing was that it was not stuffy.
Xue Lang and Lau Baicheng both wore breathing masks, but they did not use them. As they walked