You Were Asked to Guard the Border and You Built a Military Industrial City?

Zhao Tiejun, a modern-day veteran, traveled through time and became an abandoned school captain in the northern Xinjiang of the Yan Dynasty. The border is in ruins, the thousands of people in Black Rock City are short of food and armor, the Huns' cavalry are pressing down on the border, and the traitorous officials in the court are depriving them of military supplies. Holding an ancestral jade pendant in his hand, he travels between modern and ancient times without any system or golden fingers, only with knowledge and hands. Improve flintlock guns, try to grow potatoes, build cement roads, and build arsenals—from the soldiers guarding the border, you can build a military-industrial city! Mozi is the craftsman, Zhang Qian is the envoy, Guo Ziyi is the shield, Wang Anshi is the political leader, Yue Fei is the frontman... One city moved the destiny of the country, firearms shattered the faces of corrupt scholars, railways connected the Western Regions, and steam warships plowed the East China Sea!