Why is Hulunbeier the coldest place in China?

The coldest place in China is Hulunbeier, Inner Mongolia, with an altitude of 830m to1340m and a minimum temperature of -58 degrees Celsius. The recent -43.6 degrees Celsius is very warm for the residents of Hulunbeier. The average temperature in Hulunbeier is -3 1.3℃ in January and -36℃ in the morning. It is below -35℃ for about six months in a year, and it will be higher in summer, above -30℃. The temperature in this place is too low for plants to grow, and there is only a precious growth period of three months. Almost all winter is spent in the snow, and it is rainy in summer, and freezing injury at low temperature is common.