Tīng Wen Taihou He Taihou Shi Zhen De?!

Synopsis

Jiang Shu is a graduate student in the History Department. When she accidentally travels back in time to the Qi dynasty, she remembers exactly how the history went. She knows that Qi Changning is a famously tyrannical queen, regarded as a villainess in the history books. Jiang Shu was content to play along and act like an obsequious lap-dog in order to survive. However, as she spends more time with the queen, she discovers details hidden from the history books. The "demon queen" doesn't seem to be as bad as what she had read… (Source: Bilibili, translated)