I recommend "The Strategy of the Princess of a Subjugated Country Winning in Laying Down". This book was an ancient novel where a woman dressed as a man. The female protagonist was a princess of a subjugated country. Because her father had raised her to be too plump, she began to lose weight and become beautiful. At the same time, in order to take revenge, she lived as a man. In the story, her enemy turned out to be her father, and she finally got the ending of true love and revenge. I hope you like my recommendation, Mwah~