Why is it cold in the north and hot in the south?

The north is high and the south is low, with dimensional differences. In winter, the direct point of the sun is in the southern hemisphere. In northern China, the height of the sun is small at noon, the day is short, the sun has less heat and the temperature is low. In the south, the sun is high at noon and long during the day, so the sun gets more light and heat, and the temperature is high.