Can you recommend an ancient novel where the female protagonist wants to become a rice worm? Thank you!

In an ancient novel, the female protagonist liked to sleep when she was young, but she was very powerful and did not want others to know. She wanted to live a life of a rice worm. There was a shadow guard, but it was not the male protagonist. The guards always wanted to do big things, but the female protagonist only knew how to sleep. She also needed to be carried or carried to school. There was a scene where the Shadow Guard thought that the female protagonist was dead and developed gunpowder to take revenge. I hope you can help me find this novel. Thank you. It was a book that traveled through the ancient language! [There is a chapter where the female protagonist starts to go to school but doesn't want to walk. She has to be carried back to the academy by a sedan chair. I remember a lot of the content, but I can't remember the name. It's a long novel. Please help me tell you.]