1. The subject or legal agent has signed the informed consent form, agreed to not participate in other clinical researchers within 30 days from the first administration of the study drug to the last administration. 2. Aged 18 to 75 years old, 3. Meet the diagnostic criteria for pneumonia caused by new coronavirus (2019-nCoV) (seventh edition) 4. Treated patients or relapsed patients meet any of the following: (1) Fever again, or the clinical symptoms worsened, (2) The throat swab 2019nCOVRNA was positive, (3) No clinical symptoms improved or 2019nCOVRNA continued positive, (4) Chest CT showed lung inflammation or fibrosis progress.

1. The subject or legal agent has signed the informed consent form, agreed to not participate in other clinical researchers within 30 days from the first administration of the study drug to the last administration. 2. Aged 18 to 75 years old, 3. Meet the diagnostic criteria for pneumonia caused by new coronavirus (2019-nCoV) (seventh edition) 4. Treated patients or relapsed patients meet any of the following: (1) Fever again, or the clinical symptoms worsened, (2) The throat swab 2019nCOVRNA was positive, (3) No clinical symptoms improved or 2019nCOVRNA continued positive, (4) Chest CT showed lung inflammation or fibrosis progress.