Sun Wu's thirteen "The Art of War" is the earliest and most complete masterpiece of ancient military theory in China and even in the world. Compared with the first monograph on military theory in ancient Greece, Xenophon Expedition (403-355 BC), it was not only written earlier, but also of high academic value. Its content involves almost every branch of military theory; But also runs through simple materialism and dialectics. It was written by Sun Wu on the basis of summing up the experience of hundreds of wars in Shang and Zhou Dynasties, especially since the Spring and Autumn Period, which had a great influence on the development of China's military theory. Mao Yuan Yi once commented: "The former grandson does not leave the grandson, and the latter grandson does not leave the grandson." Although this is suspected of flattering, it does show the position and role of Sun Tzu's Art of War in the military history of feudal society for thousands of years. In fact, some of its principled military laws, whether in feudal society or in modern times, still have certain reference and guiding significance; It occupies an important position in the military history of China and even the world and enjoys a high reputation.