Aerial photo taken on July 9, 2022 shows the summer scenery of Huaxi National City Wetland Park in Guiyang, capital of southwest China's Guizhou Province. (Xinhua/Ou Dongqu)

Aerial photo taken on July 9, 2022 shows the summer scenery of Huaxi National City Wetland Park in Guiyang, capital of southwest China's Guizhou Province. (Xinhua/Ou Dongqu)

Aerial photo taken on July 9, 2022 shows the summer scenery of Huaxi National City Wetland Park in Guiyang, capital of southwest China's Guizhou Province. (Xinhua/Ou Dongqu)

Photo taken on July 9, 2022 shows tourists visiting the Huaxi National City Wetland Park in Guiyang, capital of southwest China's Guizhou Province. (Xinhua/Ou Dongqu)

Aerial photo taken on July 9, 2022 shows the summer scenery of Huaxi National City Wetland Park in Guiyang, capital of southwest China's Guizhou Province. (Xinhua/Ou Dongqu)