Song: Empress Dowager, Empress, Maid-in-waiting, Shu Fei, De Fei, Xian Fei, Gui Fei, Zhao Yi, Wan Rong, Shun Rong, Xiu Rong, Jie Yu and Yan Yan.
Jin: Empress Dowager, Empress, Third Lady (ladies and gentlemen), Ninth Lady (,,,Xiurong, Xiuhua,,, Chonghua), Third post (beauty, gifted scholar, middle gifted scholar).
Concubines in Song Dynasty also called themselves concubines or concubines to the queen, but it seems that the queen also called herself concubines in front of the emperor when her rank was not high.
So it should be a slave family, and slaves can also be concubines.