Can you recommend a time-travel novel with the ending where the female lead and the male lead are together?

It was probably because the lady was called Liu Xiao or something (in short, her surname was Liu, both before and after she transmigrated) and then her father in ancient times married her to the emperor (male protagonist, I forgot her name) to be the imperial concubine. Her sister in ancient times was the empress, but in fact, the emperor hated their family to the core (I forgot why). Later on, she fell in love with the emperor, and the emperor also liked her. The female protagonist then helped the male protagonist to destroy the Liu family but got the result of being banished to the cold palace. The female protagonist found out that she was pregnant, and it seemed that the male protagonist also knew about it and deliberately made love to a concubine who was originally cured by the female protagonist in front of her.(The concubine's surname seems to be Wu.) The female protagonist was so angry that she used a piece of something beside her (forgot) to smash the child and miscarried it. The female protagonist later set fire to the Cold Palace and took the opportunity to escape. Later, she went up the mountain to help a fake wife deliver the baby. Finally, she returned to the palace and found out that the female protagonist used to love the girl.(I remember her name very clearly. She is called Xin Er.) Because she is pregnant, she wants the male protagonist to take a kind of medicine. If another woman gives birth to the male protagonist's child, she will definitely die within two years. Therefore, the male protagonist wants to stimulate the female protagonist to give up the child. It is like watching the child die with his own eyes in the future. This Xin Er seems to have been killed by the Liu family back then (one corpse and two lives). In the end, it seems that the male protagonist found out that as long as he fell in love with someone else, he would slowly die. And the female protagonist used her blood to maintain his life every day (it seemed that using the blood of his beloved person could alleviate it). In the end, this poison was cured. The male protagonist abolished the six palaces for the female protagonist, and she was the only empress in the six palaces (the last chapter seemed to be called the six palaces without concubines)

Answer 1

I recommend the book,"The Time Is Leisurely." The female protagonist, Yunxi, had become one of the four Fujin after she had transmigrated to ancient times. From the Fujin to the Empress, and then to the long-lived Empress Dowager. She had always maintained her rationality and did not talk about love with Lord Fourth. However, after she successfully took her last breath, she realized that her journey through time was not over. The male protagonist, Aisin Gioro Yinzhen, had actually followed her. Lord Fourth would wear it together with the female lead, bringing along his memories. In each world, they would grow old, be an old couple, and develop feelings for each other over time. I hope you like my recommendation, Mwah ~😗