How long did my son live?

Unknown. Another passage in Historical Records records the story of Laozi's son. "The son of Laozi is a famous Sect, and the Sect is sealed." In 273 BC, Li Zong, the general of Wei State, fought against the famous Qin State in Leitian and was defeated. The date of birth and death of Li Zong is unknown. According to legend, Lao Tzu was still alive when Li Zongzhan died, so the time of death is unknown and it is impossible to confirm how long he lived.