Yang Dong, carrying a military supply warehouse, "travels" to the Ming Dynasty, just as the "Battle of Tumu Fort" is about to begin. What to do? Follow the natural course of events or change history? With so many resources at his disposal, Yang Dong's good days have arrived. A cross-era inventor? The advent of electricity and cars. A great writer under the banner of the times, "The Legend of the Condor Heroes", "The Smiling, Proud Wanderer", and a great composer, leading the forefront of fashion. Second Master's (Exploring the Clear River) is not only popular now, but it proves that it is the same in any era. Weapons expert? What is 819...