Yan's Tomb Boat Returns

Are There No Stories Where the Heroine Is Not a Concubine but a Palace Maid?

I searched all over and found articles about palace maids becoming concubines. Does it have to be the emperor's woman? A story about a palace maid who begs not to enter the harem! Can the sister who is pushing the book see clearly T-T Please don't let the palace maids in the early stage enter the harem behind them, and refuse palace fights, no matter how good-looking they are🙅