Yunnan-Guizhou Plateau is nearly 2000 meters above sea level. Although it is close to the tropics, its altitude offsets its low latitude, so it is cooler in summer. Another reason is that Yunnan is in the southwest of our country. There is a southwest monsoon from the Indian Ocean in summer, which brings a lot of steam. It often rains. Clouds and rain weaken the solar radiation, and the evaporation of rain also takes away a lot of heat, so the ground temperature is not high. This season, Yunnan is much cooler than Shenzhen in summer; In winter, Shenzhen is much warmer than Yunnan, especially in the morning and evening; In spring and autumn, Yunnan is much more comfortable. Generally speaking, the climate in Yunnan is more pleasant than that in Shenzhen.