A randomized, double-blind, low dose controlled clinical trial of Jingyin granule in the treatment of asymptomatic infection in covid-19

INTERVENTION: Test group:Jingyin Gubiao granule;Control group:Jingyin Gubiao granule very low dose (1 / 10 dose); CONDITION: COVID‐19 PRIMARY OUTCOME: Detection of N gene and ORF gene Ct value by New Coronavirus nucleic acid;Average nucleic acid negative time; SECONDARY OUTCOME: Conversion rate; INCLUSION CRITERIA: 1. Age 18‐60 years old (including 18 and 60 years old), regardless of gender; 2. Nucleic acid test results were positive, including New Coronavirus mild/asymptomatic infection. 3. Voluntarily participate in the experiment and sign the written informed consent.