Can you recommend a novel about traveling back to the Kangxi era and related to the 4th?

I want to find a book about the heroine who traveled to the Kangxi era and fell in love with Kangxi. However, 44 also fell in love with the heroine. Later, the heroine seemed to have gone back and came back again. 44 met her and finally entered the palace with the help of the other brothers. She accompanied Kangxi until he died. It seemed that there was a connection with Si Si. It shouldn't be the only one in the world, it should be written about Huang Taiji. I'm talking about a novel where the female lead falls in love with Kangxi and is related to Yongzheng. Moreover, it was Emperor Yongzheng who fell in love with the female lead. The female lead even went back and came back again, and then accompanied Emperor Kangxi until he died. I remember that the book said that Kangxi gave the throne to Yongzheng in order to compensate him. And I'm sure it's not the Qing Palace's love and the blooming of flowers and the falling of red flowers. I remember the first time I read it was on the original literature website, but now I can't find it.