The picture shows the relationship between the seasonal activity of subtropical high in summer and the rain belt in eastern China. The thick line indicates the position of subtropical high, and the sh

The picture shows the relationship between the seasonal activity of subtropical high in summer and the rain belt in eastern China. The thick line indicates the position of subtropical high, and the shaded part indicates the approximate position of rain belt. Looking at the map, we can see (1) that when the Jianghuai area enters the "Meiyu" season, the subtropical high is between 20 and 25 N, and the relationship between the rain belt and the subtropical high is that the rain belt is located on the north side of the subtropical high. (2) In the summer half year, with the seasonal northward movement and strengthening of the subtropical high, the warm and humid air flow of summer monsoon gradually moved northward, and formed a confrontation with the cold air from the north.

So the answer is: (1) between 20 and 25 N; The rain belt is located on the north side of the subtropical high; (2) In the summer half year, with the seasonal northward movement and strengthening of the subtropical high, the warm and humid air flow of summer monsoon gradually moved northward, and the frontal rain belt formed by the confrontation with the cold air in the north also gradually moved northward; (3) anticyclone; Cold front; (4) Spring drought affects spring sowing in North China, and summer drought affects rice growth in the middle and lower reaches of the Yangtze River.