A doctor sticks the Sanfu Paste on the back of a patient at a hospital in Guangzhou, south China's Guangdong Province, July 7, 2018. Sanfu Paste is a procedure in traditional Chinese medicine in which medicated patches are placed on various acupuncture points on the body. Sanfu, the hottest period on Chinese calendar, is considered a particularly suitable time for treating illness. (Xinhua/Liang Xu)