Why is the summer monsoon landing in China stronger in the hot summer years?

In the year when summer is hot but not hot, the summer monsoon landing in China is stronger. It is precisely because of the rapid spread to the Yellow River basin that there is more precipitation and lower temperature in this area in summer. When the summer monsoon is strong, it will push the rain belt to move northward quickly and stay in the north for a long time, resulting in more precipitation and more floods in the north.