This photo take on April 15, 2022 shows people enjoying themselves along the Songhua River 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)

This aerial photo taken on Sept. 26, 2022 shows the Songhua River 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 photo taken on July 30, 2019 shows a child playing along the Songhua River 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 aerial photo taken on July 1, 2020 shows a 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/Wang Jianwei)

This aerial photo taken on Oct. 4, 2022 shows a view of 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. (Xinhua/Wang Jianwei)

This aerial photo taken on July 1, 2020 shows a 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/Wang Jianwei)