I Transmigrated into a Cannon-Fodder Palace Maid and Became the Tyrant's Dearest

Lin Qianqian, a twenty-first-century corporate drone, has the misfortune of transmigrating into a book as a low-ranking palace maid serving a tyrant. There's only one way to get back to the real world: help the heroine, Xie Wanyi, ascend to the throne as empress. She has a maid's duties but spends all her time worrying about the emperor's marriage. Boo-hoo-hoo.