I recommend 'The Rebirth of the Yongzheng Concubine' to you! This book was about a concubine who was loved by Emperor Yongzheng and was reborn into the past. She did not want to experience tragedy again and tried her best to change her fate. It might be slightly different from the description in the question, but the plot is still very compact and intriguing. You will definitely like it! I hope my recommendation can meet your needs. Muah ~