Xiaoyao was afraid that Yecheng would not believe him, so he took IPAD out of his backpack. "I have a structure map of the shelter here. When I first changed it into an epidemic prevention center, the shelter was used. In order to keep the air below, a ventilation chamber with a big air outlet was set up in this place. Later, I didn't know why it was covered up. I just came to explore and found this."

PAD doesn't work in the basement. It can't even turn on. Xiao Yao is depressed. He rings and has a backup on his mobile phone. Fortunately, he doesn't have any backup. He...