Weather forecast issued by Shaanxi Meteorological Bureau.

Observing the temperature difference between day and night in two cities, we can think that the specific heat capacity of water is relatively large, and the temperature change value is relatively small when absorbing or releasing the same heat. Shanghai is a coastal city with a small temperature difference between day and night. Xi is an inland city with low water content and large temperature difference between day and night.

So the answer is: Shanghai; In the coastal city of Shanghai, the specific heat capacity of water is large, and the temperature can be adjusted.