What is the coldest place in northern China?

It's extremely cold in Sanjiang. Tuli River, Genhe River and Mohe River. Among the three rivers, the Tuli River is extremely cold, and the monthly average temperature and annual average temperature of Tuli River 1 are the lowest. However, because the Tuli River is closest to the Genhe River, people usually call the Genhe River a cold pole. The annual average temperature and 1 month average temperature in Mohe River are higher than those in Zhonghe River.