Cao Shi, also known as Mrs. Cao, was an extramarital concubine when Liu Bang, a high emperor of Han Taizu, was a civilian. Before Lv Zhi, she lived with Liu Bang. She gave birth to her eldest son, Liu Fei, and in the sixth year of the Han Dynasty (the first 20 years1year), Liu Bangli Liu Fei became the king of Qi.

Documentary records:

Historical Records Mourning the Wangs' Family in Qi Dynasty: Mourning the Wangs in Qi Dynasty (Justice: The chronology is all in Linzi. ) Liu Fei, a high-impedance man. His mother's wife is also called Cao Shi. In the sixth year of Emperor Gaozu, Li Fei became the king of Qi, eating 70 cities, and all the people who could speak in unison gave it to the king of Qi. (research: it means that its pronunciation and names are different from those of Chu and Wei. A cloud at this time, there are many people in exile, so all the people who say the same thing are also the king of Qi. )