Clinical trial of Sangsan Pu Gongying Drink to improve the clinical symptoms of patients infected with COVID-19

INTERVENTION: Test group:In addition to receiving routine treatment, the patient takes orally mulberry dandelion soup. Usage: 300ml (1 bottle) per bottle, taken orally for eight days. Adults drink 3 bottles per day.;Control group: Routine treatment of COVID‐19.; CONDITION: Infection of COVID‐19 PRIMARY OUTCOME: Number of days for nucleic acid test results to turn negative (infected patients);Improvement of clinical symptoms;Quality of life;Clinical test index ‐ oxygen saturation before and after treatment;Clinical examination indicators ‐ heart rate;Clinical laboratory examination index ‐ respiratory rate;Clinical examination indicators ‐ liver and kidney function;Clinical examination indicators ‐ blood routine+CRP;Clinical laboratory examination indicators ‐ CT imaging; INCLUSION CRITERIA: (1) Age 18‐90, gender unlimited; (2) Moderate or severe patients with COVID‐19 infection or sequelae during recovery; (3) Agree to sign a written notice before the study begins.