Yang Shen (1488～1568), the number one scholar in the Ming Dynasty, also further explained the principle of water vapor circulation. He said: "I said that water is produced by Qi, and it is also reduced by Qi. Now if you use Qi to blow things, they will get water, and if you blow water with Qi, it will dry. You can know how big it is from one drop. ... Zhuangzi also said: There is damage when crossing the river. Wind and sun can damage the water, but it is so slight that people don't notice it. If the clothes are exposed in the middle of the day and the mark is wet by the wind, you can immediately test this. And the news is also." (Ming Dynasty Yang Shen: "Zhongzong Sheng'an Complete Works", Volume 217, Volume 8, edited by Zheng Baochen)
He clearly pointed out that the evaporation of water is the reason for the eastward flow. The cause of overflow is solved and the problem of water and air circulation is solved.