What do you mean by three rivers and seven waters?

The idiom comes from Tang Li Bai's "Dangtu Zhao Yan Shaofu Fentu Landscape Song": "Dongting is full of smoke and waves, and the three rivers are full of emotions."

Emotional neutral idiom structure combination. Idioms idioms are used as subjects and objects. The ancient idioms used in the written language era are synonyms of the idioms of Sanjiang and Wuhu. For example, Song Luyou's "Shu Huai Jue Sentence" says: "Before driving Qingluan back to Dixiang, Sanjiang Qize Road is boundless."