The statement of bread is not accurate. The origin of "Fish Water" is much earlier than that of The West Chamber. In Guanzi, it is recorded that Qi Huangong asked Guanzi to invite Ning Qi out of the mountain. Ning Qi replied "Hao Hao". The pipeline doesn't know what this answer means. The attendants told him that Yi Shi (the poem of the pre-Qin period not recorded in the Book of Songs) contained "those who are rich in water, fish farmers". I don't have a home, but I was invited to live? " Ning Qi means to get married before becoming an official. Later, there was a similar content in Biography of Women, but the name of the poem was Poem of White Water. . "Fish and water" in the original poem is just a technique of "xing". But in practice, it has been used to refer to the traces of love between husband and wife. Guanzi was written in the Warring States and edited in the Han Dynasty. Biography of Lienv also had a great influence on later generations. So what is certain is that at least in the Qin and Han dynasties, this situation has already appeared.
Please accept it, thank you!