On Wuwu, the twelfth month of the eighteenth year of Emperor Kaihuang's reign in the Sui Dynasty (January 23, 599 AD), Mrs. Dou gave birth. In the delivery room, the maids and servants were busy, and the midwives Wen Po performed their duties. Outside the delivery room, Li Yuan stood with his hands behind his hands, his brows slightly furrowed, and there was an anxious look on his face. He kept pacing and murmured something: "Madam has always been weak. I hope the Bodhisattva will bless me and her son during this delivery." The attendants on the left and right stood with their heads lowered, not daring to speak.
Suddenly, a clear cry came from the delivery room. Li Yuan was overjoyed and walked forward quickly. The midwife came out with a baby in her arms. With a smile on her face, she congratulated: "Congratulations to the Duke of Tang. Madam has given birth to a son. Mother and son are safe." Li Yuan took the baby and saw that its skin was pink and tender, its eyes were closed, its little hands were clenched, and it looked so naive.