Study for the therapeutic effect and mechanism of traditional Chinese medicine in the treatment of novel coronavirus pneumonia (COVID-19)

INTERVENTION: control group:Routine supportive treatment;experimental group:TCM decoction intervention + routine supportive treatment; CONDITION: Novel Coronavirus Pneumonia (COVID‐19) PRIMARY OUTCOME: The time for the positive nucleic acid of the novel coronavirus to turn negative;Incidence of deterioration;The defervescence time;Chest CT;Primary symptom remission rate; SECONDARY OUTCOME: Haematological;C‐reactive protein;Blood gas analysis;Urine test;Blood lipid;Blood glucose;Coagulation function test;Liver function test;Renal function;The myocardial enzymes;Serum procalcitonin;T‐lymphocyte subsets;Interleukin; INCLUSION CRITERIA: (1) Patients with Novel coronavirus pneumonia diagnosed according to ; (2) Inpatients aged >18 years old; (3) Patients Know the informed consent, voluntary participate in this clinical trial and sign informed consent.