Aerial photo taken on June 17, 2020 shows the scenery of Minghu Lake National Wetland Park in Zhongshan District of Liupanshui, southwest China's Guizhou Province. (Xinhua/Tao Liang)

Aerial photo taken on June 17, 2020 shows the scenery of Minghu Lake National Wetland Park in Zhongshan District of Liupanshui, southwest China's Guizhou Province. (Xinhua/Tao Liang)

Aerial photo taken on June 17, 2020 shows the scenery of Minghu Lake National Wetland Park in Zhongshan District of Liupanshui, southwest China's Guizhou Province. (Xinhua/Tao Liang)

Aerial photo taken on June 17, 2020 shows the scenery of Minghu Lake National Wetland Park in Zhongshan District of Liupanshui, southwest China's Guizhou Province. (Xinhua/Tao Liang)

Aerial photo taken on June 17, 2020 shows the scenery of Minghu Lake National Wetland Park in Zhongshan District of Liupanshui, southwest China's Guizhou Province. (Xinhua/Tao Liang)

Aerial photo taken on June 17, 2020 shows the scenery of Minghu Lake National Wetland Park in Zhongshan District of Liupanshui, southwest China's Guizhou Province. (Xinhua/Tao Liang)

Aerial photo taken on June 17, 2020 shows the scenery of Minghu Lake National Wetland Park in Zhongshan District of Liupanshui, southwest China's Guizhou Province. (Xinhua/Tao Liang)

Aerial photo taken on June 17, 2020 shows the scenery of Minghu Lake National Wetland Park in Zhongshan District of Liupanshui, southwest China's Guizhou Province. (Xinhua/Tao Liang)

Aerial photo taken on June 17, 2020 shows the scenery of Minghu Lake National Wetland Park in Zhongshan District of Liupanshui, southwest China's Guizhou Province. (Xinhua/Tao Liang)