Photo taken on Sept. 2, 2020 shows a dragonfly in a tropical rainforest in south China's Hainan Province. (Xinhua/Pu Xiaoxu)

Photo taken on Sept. 3, 2020 shows a tree in a tropical rainforest in south China's Hainan Province. (Xinhua/Pu Xiaoxu)

Photo taken on Sept. 2, 2020 shows aerial roots in a tropical rainforest in south China's Hainan Province. (Xinhua/Pu Xiaoxu)

Photo taken on Oct. 25, 2019 shows a gibbon in a tropical rainforest in south China's Hainan Province. (Xinhua/Pu Xiaoxu)

Photo taken on Sept. 4, 2020 shows roots of a tree in a tropical rainforest in south China's Hainan Province. (Xinhua/Pu Xiaoxu)

Photo taken on Sept. 4, 2020 shows a Hainan eld's deer in the Datian National Nature Reserve in south China's Hainan Province. (Xinhua/Pu Xiaoxu)

Photo taken on Sept. 2, 2020 shows a tree in a tropical rainforest in south China's Hainan Province. (Xinhua/Pu Xiaoxu)

Photo taken on Sept. 2, 2020 shows a lizard in a tropical rainforest in south China's Hainan Province. (Xinhua/Pu Xiaoxu)

Photo taken on Sept. 4, 2020 shows a thousand-year-old tree in a tropical rainforest in south China's Hainan Province. (Xinhua/Pu Xiaoxu)

Photo taken on Sept. 3, 2020 shows roots of a tree in a tropical rainforest in south China's Hainan Province. (Xinhua/Pu Xiaoxu)