Members of the marine contingent of Hainan Blue Sky Rescue Team are seen in Haikou, capital of south China's Hainan Province, Nov. 9, 2020. The Hainan Blue Sky Rescue Team established its marine contingent on Monday to enhance the capability of marine emergency rescue. (Xinhua/Pu Xiaoxu)

Members of the marine contingent of Hainan Blue Sky Rescue Team are seen in a boat on Nandu River in Haikou, capital of south China's Hainan Province, Nov. 9, 2020. The Hainan Blue Sky Rescue Team established its marine contingent on Monday to enhance the capability of marine emergency rescue. (Xinhua/Pu Xiaoxu)

Members of the marine contingent of Hainan Blue Sky Rescue Team are seen in a boat on Nandu River in Haikou, capital of south China's Hainan Province, Nov. 9, 2020. The Hainan Blue Sky Rescue Team established its marine contingent on Monday to enhance the capability of marine emergency rescue. (Xinhua/Pu Xiaoxu)

Members of the marine contingent of Hainan Blue Sky Rescue Team are seen in a boat on Nandu River in Haikou, capital of south China's Hainan Province, Nov. 9, 2020. The Hainan Blue Sky Rescue Team established its marine contingent on Monday to enhance the capability of marine emergency rescue. (Xinhua/Pu Xiaoxu)