Why is there rainy weather in the middle and lower reaches of the Yangtze River and Yunnan-Guizhou Plateau? What do these two places have in common?

1, the middle and lower reaches of the Yangtze River are called "Meiyu" in June and July every year, and the Yunnan-Guizhou Plateau has persistent rainy weather in winter, but it is not called "Meiyu".

2. Both places are controlled by quasi-static front, which leads to continuous precipitation;

The Yangtze River area is balanced by the northern warm air mass and the southern cold air mass, and the formed front hovers back and forth in the Jianghuai area, forming a quasi-static front in the Jianghuai area;

Yunnan-Guizhou Plateau: When the northwest monsoon reaches the northern edge of Yunnan-Guizhou Plateau in winter, its power has been greatly weakened, so it can't continue southward due to the topography of Yunnan-Guizhou Plateau, and it meets the warm air entrenched in Yunnan-Guizhou Plateau, forming a quasi-static front in Kunming.

2. Both places have continuous rainy weather; The middle and lower reaches of the Yangtze River appear in June and July, and the Yunnan-Guizhou Plateau appears in winter.

3. Rainy weather is caused by quasi-static front; (The middle and lower reaches of the Yangtze River are quasi-static fronts of Jianghuai and Yunnan-Guizhou Plateau are quasi-static fronts of Kunming)