View of wetland parks in Changshu, E China's Jiangsu

This undated file photo shows waterfowls at the Shajiabang national wetland park in Changshu, east China's Jiangsu Province. (Xinhua)

An "international wetland city" from the Ramsar Convention, Changshu of east China's Jiangsu Province boasts a total area of 29,921.61 hectares of wetlands.

A man takes photos in the Shajiabang national wetland park in Changshu, east China's Jiangsu Province, Nov. 15, 2022. (Xinhua/Ji Chunpeng)

This aerial photo taken on Nov. 15, 2022 shows a view of the Shajiabang national wetland park in Changshu, east China's Jiangsu Province. (Xinhua/Ji Chunpeng)

This photo taken on Nov. 15, 2022 shows a view of the Shanghu national urban wetland park in Changshu, east China's Jiangsu Province. (Xinhua/Yang Lei)

This photo taken on Nov. 15, 2022 shows a view of the Shanghu national urban wetland park in Changshu, east China's Jiangsu Province. (Xinhua/Yang Lei)

This aerial photo taken on Nov. 15, 2022 shows a view of the Shajiabang national wetland park in Changshu, east China's Jiangsu Province. (Xinhua/Yang Lei)

This photo taken on Nov. 15, 2022 shows a view of the Shajiabang national wetland park in Changshu, east China's Jiangsu Province. (Xinhua/Yang Lei)

This photo taken on Nov. 15, 2022 shows a view of the Shajiabang national wetland park in Changshu, east China's Jiangsu Province. (Xinhua/Yang Lei)

This aerial photo taken on Nov. 15, 2022 shows a view of the Shajiabang national wetland park in Changshu, east China's Jiangsu Province. (Xinhua/Yang Lei)

Shutterbugs take photos in the Shanghu national urban wetland park in Changshu, east China's Jiangsu Province, Nov. 15, 2022. (Xinhua/Ji Chunpeng)