"Han Feizi·Jie Lao" [Foreword] The two chapters "Jie Lao" and "Yu Lao" in "Han Feizi" are important annotations and interpretations of the Taoist classic "Laozi". Pre-Qin Legalism was originally an extremely powerful knowledge, with much that was truly gratifying, while the Taoism of Lao Tzu was far more profound and profound than other schools of thought. The sharp Legalism and the profound Taoism are of the same origin, so scholars have a saying that "Tao generates law". And Han Fei "has a knowledge of Xixing Mingmao, which can be traced back to Huang Lao".