At the same time the plum rains "ebb" in Taiwan, they are still "flowing" over the Yangtze River Basin on the mainland. Following the same logic, when the plum rains "ebb" along the Yangtze River Basin, they are just beginning to "flow" along the Yellow River Basin.
而台灣的「出梅」，正好就是長江流域「入梅」的日子；以此類推，長江流域出梅，黃河流域才入梅。