A doctor extracts a tooth for a man in the Chinese hospital ship Peace Ark in Djibouti, on Aug. 24, 2017. The Peace Ark arrived in Djibouti on Wednesday and was expected to carry out a nine-day medical service in Djibouti. It will then travel to Sierra Leone, Gabon, Tanzania and other countries to provide free medical and humanitarian services. (Xinhua/Wang Shoubao)
