Laozi or Lao-tze (c. 500 BC), Chinese philosopher, the founder of Taoism · the sacred book of Daoism, by Laozi

The title "Zi" was an honorific title for learned scholars in ancient China, such as Confucius, Laozi, Mozi and Han Feizi.

Laozi's real name was Li Er.

Laozi is an honorific title given to him by others.

Taoism was founded on the teachings of Laozi, a sage born in 604 B.C. in present-day Henan Province.