More surprisingly, the reporter even found more than ten beds, a physiotherapy room and a dining room in the fourth hall. According to Miss Nina's introduction, because the temperature under the well is 12 degrees centigrade all year round, and the air contains sodium chloride and realgar, which have significant curative effect on the treatment of respiratory diseases, so here has also become a place for tracheitis or asthma patients to recuperate and cure. However, patients recuperating here do not live underground, but stay underground for several hours every day according to medical advice. The meals eaten by patients underground are also prepared on the ground and sent down.