(230607) -- SANYA, June 7, 2023 (Xinhua) -- Wang Fengguo works underwater at a marine ranch in the sea area of Wuzhizhou Island in Sanya, south China's Hainan Province, Jan. 12, 2020. Wang Fengguo is a staff member of the Wuzhizhou Island tourist resort in Sanya, whose main job responsibilities include removing marine waste and coral predators, carrying out artificial reef installation and coral transplantation, and helping with scientific researches at the marine ranch in the sea area of Wuzhizhou Island. As a front-line worker committed to marine environmental protection for over ten years, Wang has witnessed significant progress of marine ecosystem restoration at this China's first tropical marine ranch. (Xinhua/Yang Guanyu)