Tao Te Ching, the philosophical works of Lao Tzu (Li Er) in the spring and Autumn period, is also known as "Tao Te Zhen Jing", "Lao Zi", "five thousand words" and "Lao Zi's five thousand essays". It is a work before the separation of the pre Qin philosophers in ancient China and an important source of Taoist philosophy. The Tao Te Ching is divided into two parts. The first part of the original "De Jing" and the second part of "Dao Jing" are not divided into chapters, which are later changed into "Dao Jing" with 37 chapters in front, and 38 chapters as "De Jing" after which are divided into 81 chapters. Tao Te Ching is one of the greatest masterpieces in Chinese history, which has a profound impact on traditional philosophy, science, politics and religion. According to the statistics of UNESCO, Tao Te Ching is one of the most popular cultural works translated into foreign languages except the Bible.