C1266 Unbelieving evil

Xiao Yao was afraid that Ye Cheng would not believe him, so he took out the IPAD from his backpack. I have a blueprint of the shelter here, and when I first changed it to the epidemic prevention institute, I used the shelter here. In order to keep the air below, I built a ventilation chamber here, and there was a gale opening there. Afterwards, for some unknown reason, it was covered up.

However