晋献公
Li Ji (; died 651 BCE) was a concubine and later wife of Duke Xian of Jin, ruler of the State of Jin between 676 and 651 BC during the Spring and Autumn period of ancient China. Li Ji is best known for starting the Li Ji Unrest which led to the suicide of Prince Shensheng. She also placed her own son Xiqi on the Jin throne after the death of Duke Xian. She was nicknamed as the "Witch of the Age" () because of her devious acts.