Epidemiological data >16,000,000 psychiatric patients in China (>10%) 10%~15%of prescriptions related to psychotropic drugs in the United States Shanghai data:severe depression(2.8%)>16,000,000 psychiatric patients in China (>10%) 10%～15% of prescriptions related to psychotropic drugs in the United States Shanghai data: severe depression (2.8％) Epidemiological data