The Heilongjiang Grand Khingan Shuangheyuan Wetlands are located between the Grand and Lesser Khingan Mountains in north-eastern China. The wetland system is drained by the Wolegen River, and is mixed with temperate coniferous and broad-leaved forests. Seasonal permafrost obstructs the flow of the diverging branches of the Wolegen River and creates different types of marshes and peatlands which cover the majority of the Site’s area. The biodiversity is rich, with 432 species of vascular plants and 294 species of vertebrates. Most of the species are either indigenous or rare, such as the Siberian musk deer (Moschus moschiferus) and Siberian taimen (Hucho taimen). Threatened birds including Siberian crane (Grus leucogeranus) and oriental stork (Ciconia boyciana) are also found. The Site has an important role in flood prevention, regional climate regulation and biodiversity maintenance, and ensures water security for the larger Heilongjiang River basin.