"Guan Yinzi" is just the official name. Pass refers to the pass through which Lao Tzu left Hanguan. The person who guarded the pass was called Guan Lingyin, and his name was Xi, so he was called Guan Lingyin Xi, and later generations respectfully called him Guan Yinzi.

According to legend, Laozi saw through the situation at that time and knew that the Emperor of Zhou was not going to rule soon, so he left the west of Zhou and went to Hanguan. Yin Xi, the governor of Hanguan, had long admired my name, so he kindly stayed with me and asked for advice. In order to leave behind five thousand words of the Tao Te Ching, I rode an ox to the west.

Guan Lingyin liked to study Lao Yu's studies, and he had many insights and insights, which he wrote and wrote into the book "Guan Yinyu". However, due to the disaster of war, his books were lost. It was called "Wenshi Zhenjing" after the rise of Taoism, just like "Zhuangzi" was called "Nanhua Sutra". Because Zhuangzi was named Nanhua Zhenzhen, his work should be called "Nanhua Sutra".

Guan Yinzi was granted the title of Wenshi Zhenren, so his book should also be called "Wenshi Zhenjing". The so-called "Wenshi" can be understood as the beginning of civilization. Because he accepted Laozi's teachings, he developed wisdom, cultivated the Tao, and achieved achievements, which is the highest state of human civilization.

The "Guan Yinzi" we see today is a fake book written by someone from the Tang and Song Dynasties. Fragments of his thoughts are preserved in "Lu Shi Chun Qiu" and "Zhuangzi". His main ideas are: he proposed "eternal nothingness" and "eternal existence", and regarded "Taiyi" (the Tao mentioned by Laozi) as the root of all things; Taking humility and humility as the external code of conduct, the heart is empty and quiet, and living in harmony with all things; conforming to nature, taking advantage of the situation, being calm and uncluttered; not being first to others is similar to Lao Tzu's "dare not to be the first in the world."