In Ergune, Inner Mongolia autonomous region, wetlands, rivers, lakes, forests and grasslands coexist. (Photo by Cai Guang/For chinadaily.com.cn)

Ergune, Inner Mongolia autonomous region, has about 1.56 million hectares of wetlands with high latitude, low altitude and diverse plant species. Forests, grasslands, wetlands, rivers and lakes coexist in Ergune. White birch is the official tree of the city, which is also an important link in the ecosystem of the Greater Hinggan Mountains.