Sui and Tang Dynasties were a glorious period in Chinese history, and also had an important influence in world history, forming a glorious page in world history. The economic and cultural exchanges between China and foreign countries during the Sui and Tang Dynasties and the status of the Sui and Tang Dynasties in world history are now becoming the focus of academic research, and many works have been published. Many scholars believe that: (1) China's system in the Sui and Tang Dynasties was in a leading position in the world history. In the history of all advanced countries at that time, no country entered the feudal society earlier than China. When the Sui Dynasty was founded, the feudal system in Western Europe lasted only one century. As the center of feudalism in Europe, France was 700 years behind China in terms of the beginning of feudalism. (2) In terms of social and economic prosperity, Sui and Tang Dynasties were first-class in the world at that time. At that time, the major cities in the world were Chang 'an, Constantinople and Baghdad. Chang 'an had a population of one million, Constantinople had 800,000, and Baghdad was even less. Chang 'an has the largest population, which not only reflects its industrial and commercial development, but also shows that its agricultural production has reached a higher level. (3) The high culture of Sui and Tang Dynasties made China the birthplace of oriental culture, which had an important influence on the civilized development of Asian countries such as Japan and Korea. (4) Sui and Tang Dynasties were the center of economic and cultural exchanges between the East and the West at that time. The fact that China's silk products and papermaking were introduced to the eastern and western countries in the Sui and Tang Dynasties, and that China's Buddhism, poetry and science and technology were introduced to the eastern countries in large quantities, proves that China in the Sui and Tang Dynasties played a bridge role in the cultural exchange between the east and the west. Therefore, the Sui and Tang Dynasties played a very important role not only in the history of China, but also in the history of the world at that time.