Why did Guangdong suddenly get cold?

First, the cold air moves south, pushing the warm air over Guangdong to the south, causing the atmospheric temperature in Guangdong to drop sharply.

Second, the direct point of the sun moves southward, which greatly reduces the heat gained by Guangdong's atmosphere and surface. With the arrival of cold air, the heat originally stored on the surface is also lost and cannot be replenished in time.

So it will cause the temperature in Guangdong Province to suddenly get cold. When the surface slowly absorbs a certain amount of heat, the temperature can rise.