Zhang Boli, an academician of the Chinese Academy of Engineering, speaks at a press conference in Wuhan, capital of central China's Hubei Province, March 23, 2020. Clinical observation showed that traditional Chinese medicine (TCM) has proven to be effective in the treatment of over 90 percent of all confirmed COVID-19 cases on the Chinese mainland, said a TCM official on Monday. (Xinhua/Chen Yehua)
