File photo taken June 2, 2018 shows a Russian tourist experiencing moxibustion treatment at Sanya International Friendly Chinese Medicine Sanatorium in Sanya, south China's Hainan Province. Traditional Chinese medicine (TCM), one of the world's oldest forms of medicine with different practices including acupuncture, bee-sting therapy, cupping, moxibustion, scrapping, tui na (Chinese therapeutic massage), still prevails in the modern society after thousands of years of evolution, during which generations have restored and maintained health depending on it. The World Health Organization disease index was updated to include references to traditional Chinese medicine for the first time in June 2018. (Xinhua/Guo Cheng)