What will happen in July and August in the middle and lower reaches of the Yangtze River?

There will be a summer drought in the middle and lower reaches of the Yangtze River in July and August. In June, the middle and lower reaches of the Yangtze River were affected by quasi-static fronts, resulting in rainy weather. When the front moves northward to North China and Northeast China, the middle and lower reaches of the Yangtze River are controlled by a single subtropical high, and the precipitation is scarce, resulting in summer drought.