Baidu post bar. Qinglongshan sanatorium is a mental hospital composed of mentally retarded people, which has no connection with Nanjing Qinglongshan mental hospital in reality. It is an officially designated disease center for the mentally retarded. Applications can be downloaded from Baidu Post Bar. The stem of fig comes from the legend that there is a fig tree in the toilet, and the fig produced is the favorite food of mentally retarded people, which has no practical significance. Mental Retardation Bar is a Baidu Post Bar with original paragraphs as the main content, and it is one of the gathering places of high-quality original content at present.