Scenery of Wanfeng Lake in Nanpan river town, SW China

This aerial photo taken on July 5, 2023 shows a boat sailing on Wanfeng Lake in Nanpan river town of Xingyi City in southwest China's Guizhou Province. Covering an area of 176 square kilometer, the Wanfeng Lake serves as an important ecological barrier to Pearl River Delta region. The local authority has taken proactive measures to tackle pollution and improve the water quality here. (Xinhua/Tao Liang)

This photo taken on July 5, 2023 shows a boat sailing on Wanfeng Lake in Nanpan river town of Xingyi City in southwest China's Guizhou Province. Covering an area of 176 square kilometer, the Wanfeng Lake serves as an important ecological barrier to Pearl River Delta region. The local authority has taken proactive measures to tackle pollution and improve the water quality here. (Xinhua/Tao Liang)

This aerial photo taken on July 5, 2023 shows a boat sailing on Wanfeng Lake in Nanpan river town of Xingyi City in southwest China's Guizhou Province. Covering an area of 176 square kilometer, the Wanfeng Lake serves as an important ecological barrier to Pearl River Delta region. The local authority has taken proactive measures to tackle pollution and improve the water quality here. (Xinhua/Tao Liang)

This aerial photo taken on July 4, 2023 shows the scenery of Wanfeng Lake, which is located at the juncture area of southwest China's Yunnan Province, Guizhou Province and south China's Guangxi Zhuang Autonomous Region. Covering an area of 176 square kilometer, the Wanfeng Lake serves as an important ecological barrier to Pearl River Delta region. The local authority has taken proactive measures to tackle pollution and improve the water quality here. (Xinhua/Tao Liang)

This aerial photo taken on July 4, 2023 shows a boat sailing on Wanfeng Lake in Nanpan river town of Xingyi City in southwest China's Guizhou Province. Covering an area of 176 square kilometer, the Wanfeng Lake serves as an important ecological barrier to Pearl River Delta region. The local authority has taken proactive measures to tackle pollution and improve the water quality here. (Xinhua/Tao Liang)

This aerial photo taken on July 4, 2023 shows a boat sailing on Wanfeng Lake in Nanpan river town of Xingyi City in southwest China's Guizhou Province. Covering an area of 176 square kilometer, the Wanfeng Lake serves as an important ecological barrier to Pearl River Delta region. The local authority has taken proactive measures to tackle pollution and improve the water quality here. (Xinhua/Tao Liang)

This aerial photo taken on July 4, 2023 shows a boat sailing on Wanfeng Lake in Nanpan river town of Xingyi City in southwest China's Guizhou Province. Covering an area of 176 square kilometer, the Wanfeng Lake serves as an important ecological barrier to Pearl River Delta region. The local authority has taken proactive measures to tackle pollution and improve the water quality here. (Xinhua/Tao Liang)