I Was Beheaded in Zhenguan and Took Out Big Ivan with My Backhand

Others traveled through time and became princes, while I traveled through time and became the execution ground. Others' golden fingers are the system, but mine is the brain - I have a doctorate in weapons engineering from the National University of Defense Technology, and I take away a complete set of military industry knowledge in a package. Li Shimin asked me what my skills were, and I said: I can turn iron into steel, make knives faster, and make Turkic people frightened. He said: I don't believe it. I said: try it. On the first day, the first crucible steel of the Tang Dynasty was smelted, and Cheng Yaojin's ax was cut in two. In the first month, the first flintlock gun was made, and Li Shimin's tea cup almost fell to the ground. In the first year, the Shenji Battalion expanded from 37 to 300 people, and 200,000 Turkic cavalry were beaten until they fled. Someone asked me, where did you learn these things? I said: A place far, far away. Asked again: What is the name of that place? I laughed. That place is called the 21st century.