A modern engineering man who accidentally traveled back in time to the moment when the Tang Empire was about to collapse. In order to reverse the trajectory of history and allow the Chinese nation to avoid two foreign rule and the humiliating history it suffered in modern times, he borrowed modern political and economic systems and scientific and technological knowledge in an attempt to save this huge empire that was about to perish and had the most advanced civilization on earth at that time. In the following years, imperial soldiers appeared in the Japanese islands in the east, the Koryo Peninsula in the north, the Kunjian Protectorate, the Caucasus region, and even the Volga River Basin, reaching the Amu Darya River in the west, the Euphrates River Basin, Taihe City, Thanglong City, Chenla, Ceylon, Shendu, Tianzhu and other places, without exception. Along with the iron and blood came the mighty caravans of the Han nation and countless theories that spread Confucian and Taoist civilization. From then on, the giant dragon of the Chinese nation stood at the top of the world. The historical trajectories of a large number of real-world characters in the book are completely reversed.
