"Lao Tzu", also known as "moral classics," Taoist classics, according to legend, is the late Spring and Autumn Chu people Lao Ji, all received a total of 81 chapters. Lao Tzu is a speech collection of Lao Tzu's philosophical thoughts, systematically expounding Lao Tzu's outlook on the universe, politics and epistemology. "Tao" is the basic category in which Lao Zi-Zhe does not think. Lao-tzu believes that "Tao" is the origin of the universe. It is independent of anything else and changes constantly and continuously. And "virtue" Is the concrete application of "Tao" in life, social and political life. The English translation of this book is one of the more influential English versions, with some revisions made in the book. The book is accompanied by the silk book Laozi unearthed in the Mawangdui Han Tomb of Changsha in 1972.