Book excerpt: Traditional Chinese Medicine has played an important role in the treatment of COVID-19 in China. As the first batch of national Chinese medicine team in China, the authors shared their experience of treating severe COVID-19 cases with TCM at Jinyintan Hospital in Wuhan, the epicenter of the outbreak in China. Twenty severe cases have been selected and reported in this book. The medical history, inspection results and treatment rationales have been described in detail, adequately illustrated with color pictures of the tongues.The book is organized as follows: The etiology and pathogenesis from TCM perspectives are comprehensively discussed in the introduction. Part I includes various theories of different experts. Part II presents reports of the clinical cases one by one.