Was there a book about the female protagonist becoming a human from a fish and the male protagonist becoming an emperor? Anxious!

The female protagonist was a fish. When she saw the male protagonist who was picking lotus flowers in the pond (the male protagonist seemed to be the emperor. At this time, the male protagonist was very young, eight or so years old), she waited every day... Later, his soul entered a woman named Wen Qing and became a human.(Wen Qing had an elder sister named Wen Zhen. Their father was killed by the male protagonist.) Later on, the female lead was conferred the title of Consort Qing…(The introduction said that the female protagonist was later sent to another country by the male protagonist)... Which great god quickly tell me the title of the book! Thank you! Thank you very much! No, I've only read half of the novel. I don't remember the title.