From the end of 2019 to the beginning of 2020,Wuhan experienced the epidemic of COVID-19,and Academician Tong Xiaolin fought against the epidemic for more than 60 days.During this period,he put forward many academic viewpoints and practical plans,which are listed below. 1)He identified COVID-19 as “cold-dampness plague” based on the “three-dimensional qualitative” method. 2)For the early-stage patients,he formulated the formulas targeting the “cold-dampness plague”(Hanshiyi Formulas for short) by ventilating lung and resolving dampness to cut off the epidemic at an early stage. 3)He created the “Wuchang Pattern” to efficiently carry out Hanshiyi Formulas,and shifted the focus of prevention and control to the communities. 4)For the patients at the critical stage,he discovered that “stagnant heat entering nutrient-blood” was the key pathogenesis of the exacerbation,and formulated a series of treatment methods. 5)For the patients at the convalescent stage,he proposed a clinical strategy of syndrome differentiation and treatment from “deficiency,toxin,and blood stasis”,and formulated a general formula for the recovery period accordingly. 6)From the perspective of “staging-syndrome differentiation”,he divided the “cold-dampness plague” into four stages and 16 syndromes based on the theory of “treating disease before its onset”,and established a complete system of differentiation and treatment of “cold-dampness plague”.