Placebo:2 tablets placebo BID, complicated with therapy recommended by New Coronavirus Infected Pneumonia Diagnosis and Treatment Scheme (revision of Trial Version 5)

Cancelled by the investigator A randomized, double-blind, parallel, controlled trial for comparison of phosphoric chloroquine combined with standard therapy and standard therapy in mild/common patients with novel coronavirus pneumonia (COVID-19)

Cancelled by the investigator A randomized, double-blind, parallel, controlled trial for comparison of phosphoric chloroquine combined with standard therapy and standard therapy in mild/common patients with novel coronavirus pneumonia (COV