This aerial photo taken on Oct. 4, 2022 shows the Alejin Island Wetland Park in Harbin, northeast China's Heilongjiang Province.

Through long-term protection and restoration efforts, Harbin is emerging as a wetland paradise.

The city was certified as an "international wetland city" in 2018.

Many ecological parks in the city have become ideal places for people to do exercises, such as hiking, cycling and roller skating, as well as other recreational activities. (Xinhua/Zhang Tao)

This aerial photo taken on Oct. 4, 2022 shows the Hulan River estuary wetland park in Harbin, northeast China's Heilongjiang Province.

Through long-term protection and restoration efforts, Harbin is emerging as a wetland paradise.

The city was certified as an "international wetland city" in 2018.

Many ecological parks in the city have become ideal places for people to do exercises, such as hiking, cycling and roller skating, as well as other recreational activities. (Xinhua/Zhang Tao)

This aerial photo taken on Sept. 26, 2022 shows the Yangmingtan Bridge and the surrounding wetlands in Harbin, northeast China's Heilongjiang Province.

Through long-term protection and restoration efforts, Harbin is emerging as a wetland paradise.

The city was certified as an "international wetland city" in 2018.

Many ecological parks in the city have become ideal places for people to do exercises, such as hiking, cycling and roller skating, as well as other recreational activities. (Xinhua/Wang Jianwei)

This photo taken on Sept. 6, 2018 shows the Sun Island scenic area in Harbin, northeast China's Heilongjiang Province.

Through long-term protection and restoration efforts, Harbin is emerging as a wetland paradise.

The city was certified as an "international wetland city" in 2018.

Many ecological parks in the city have become ideal places for people to do exercises, such as hiking, cycling and roller skating, as well as other recreational activities. (Photo by Zhang Shu/Xinhua)