Navy soldiers of Chinese hospital ship Peace Ark wave to people as the ship sails off Dar es Salaam, Tanzania, on Nov. 26, 2017. Tanzanian President John Magufuli on Sunday thanked Chinese doctors for treating more than 6,000 patients in the Chinese naval hospital ship Peace Ark during its eight-day stay in Tanzania's Dar es Salaam. (Xinhua/Jiang Shan)
