A photograph of an underwater scene at the Wuzhizhou Island scenic spot captured by photographer Wang Baomin during a four-day photo contest in Sanya City, Hainan Province. (Photo/China News Service)

A photograph of an underwater scene at the Wuzhizhou Island scenic spot captured by photographer Wang Baomin during a four-day photo contest in Sanya City, Hainan Province. (Photo/China News Service)

A photograph of an underwater scene at the Wuzhizhou Island scenic spot captured by photographer Wang Baomin during a four-day photo contest in Sanya City, Hainan Province. (Photo/China News Service)

A photograph of an underwater scene at the Wuzhizhou Island scenic spot captured by photographer Wang Baomin during a four-day photo contest in Sanya City, Hainan Province. (Photo/China News Service)

A photograph of an underwater scene at the Wuzhizhou Island scenic spot captured by photographer Wang Baomin during a four-day photo contest in Sanya City, Hainan Province. (Photo/China News Service)

A photograph of an underwater scene at the Wuzhizhou Island scenic spot captured by photographer Wang Baomin during a four-day photo contest in Sanya City, Hainan Province. (Photo/China News Service)