"Historical Records: A Family of Wife" No. 19:
The king and queen gave birth to four sons. The previous kings died before they became emperors. When the king of Dai became emperor, the four sons born to the queen fell ill and died. A few months after Emperor Xiaowen was established, the ministers asked him to appoint the crown prince. The eldest son, Dou Ji, was the crown prince. Dou Ji was made the queen, and the female prostitute was the eldest princess.
Emperor Wen of the Han Dynasty, Liu Heng, was a pioneer in the famous "Wenjing rule" of governance.
Tai Shigong's short thirty-six words hint at a past event that future generations cannot bear to dwell on.