Cheng Kai (2nd L), an editor of the new book "Chinese Acupuncture and Moxibustion" and professor in Beijing University of Chinese Medicine, demonstrates the needle therapy at an acupuncture seminar in Maryland, the United States, on Sept. 14, 2019. The new edition of a widely-received international acupuncture textbook was marketed in the United States on Saturday, offering a long-awaited tutorial for the growing number of acupuncture practitioners in the country. (Xinhua/Zhou Zhou)