Ask for the name of a time-travel novel

The female lead traveled from the modern era to an unknown dynasty. In the modern era, she was a very good-looking but very fat woman. She seemed to have the surname Yan, but she forgot. Later on, he transmigrated to his original body, where fat was considered beautiful, so he became a great beauty that could topple countries. After she transmigrated, she met a handsome man in the woods. She was carrying an umbrella with the words 'Hello Kitty' written on it. So the beautiful man asked what it was, and the female protagonist said hello KITTY. Then the female protagonist left with the beautiful man, and the plot later was forgotten.
In modern times, the female protagonist had a younger sister. She was very beautiful and many people chased after her. There was a man who said that if the female lead lost 20 pounds, he would definitely pursue her. I don't know if the female protagonist's surname is "Yan" or not

Answer 1

The name of this transmigration novel was " Return to the Ming Dynasty as a Prince ".