The weather in Xinjiang is very mixed. Is it hot during the day and cold at night?

There is much water in the mainland, and the specific calorific value of water is high. It absorbs a lot of heat during the day and slowly releases it at night, so the temperature difference is not that big. Xinjiang has less water and more Gobi, and the specific calorific value of sandy soil is low, so it stores less heat during the day, so it is particularly hot during the day and releases less heat at night, so the temperature at night is low and the temperature difference is large.