Sister's Place in Palace, I Marry Wrong and Become Empress

My elder sister refuses the imperial marriage, forcing me to take her place as a concubine. I intended to live quietly, but my extraordinary talent earns me the unprecedented title of Hui Shu Fei, equal in rank to the Noble Consort. My sister, filled with resentment, allies with powerful court figures to fight back, yet I effortlessly dismantle every plot. Once the truth is revealed, I assist the Emperor in reforming the court and saving the people of the Northern State, ultimately rising to become Empress and sharing a loving life with the monarch.