Xining and Jinan have roughly the same latitude. Why is the heating time long in Xining? The terrain is undulating. B economic level. The distance between land and sea. What is the latitude position?

The height of the terrain and the distance between the land and the sea have an influence. Xining is located at a high altitude, and the temperature is lower than that of Jinan in the same latitude plain area. You can refer to the Qinghai-Tibet Plateau, which has a very high altitude. The winter is longer, so the heating time is longer. Jinan is near the sea, regulated by the ocean, relatively warm, with a small annual temperature difference. If this question is a single choice, choose the terrain height, if it is a multiple choice, plus the distance between land and sea.