When he got to the western border of China, he met a border guard there who asked him to write down his knowledge about the Dao for the sake of Chinese society before he left the world. So he wrote the Daodejing at that time.
When he got to the western border of China, he met a border guard there who asked him to write down his knowledge about the Dao for the sake of Chinese society before he left the world. So he wrote the Daodejing at that time.