She was the mother of Emperor Gaozong's eldest son, Li Zhong, who later became the crown prince of the Tang dynasty.
While Lady Liu's personal background and the circumstances surrounding her entry into the imperial palace remain unclear, historical records indicate that she was a palace maid of Prince Li Zhi (later Emperor Gaozong) and held the title of "concubine" (fei), a rank within the imperial harem.
[2] Following the birth of her son, Lady Liu's presence in historical records fades away.
This proposal likely stemmed from Liu Shi's hope that Li Zhong's elevation would strengthen his own position and influence within the court.
However, due to political maneuvering and favoritism, Emperor Gaozong eventually designated his third son, Li Hong, as the crown prince and successor to the throne.