Find a time-travel novel

The story was about a girl who had been dreaming since she was young. She dreamed that a man was in her dream. In ancient times, the man's family was a businessman. He also dreamed that the woman was wearing a white ancient dress. The man had never seen the woman's face. The man called the woman Fairy Furong (a bit old-fashioned ~~~)
What kind of cabinet did the woman use to travel to ancient times…
Then, after some things happened, the man found out about this and fell in love with the woman. When the woman disappeared, the man went to the cabinet that the woman had mentioned and called for her. Who knew that the woman had gone to help an auntie with a lawsuit, and the man had smashed the cabinet in front of her…In short, they ended up together.
Who knew that you had to tell me! Please ~~~~~~~

Answer 1

She traveled to ancient times and became a palace maid. One day, she accidentally discovered that the emperor beside her was being abused by a beautiful woman. In order to save the emperor, she decided to step forward.