Late Ming Dynasty: My Opponent Has Industrialized

Spring, the fourteenth year of Chongzhen. Before the bloody battle of Songjin ended, Li Zicheng had sent troops to Hebei, changed the name to "Yongchang", established six ministries, and established military equipment supervision. History is cracked here - the country's subjugation that was supposed to happen three years later hit this newly awakened body in advance. Chen Heng opened his eyes and saw a mountain of corpses and a sea of ​​blood from King Qin's army in Xuanfu. What he holds in his hand is a fire gun engraved with the number "Yongchang First Year - A Zi - Ling Si Qi". The threads processed by the lathe and the sand holes forged by hand are rough but strangely regular. This is the iron of the seventeenth century, but it reveals the ambition of the nineteenth century. And Chen Heng is just an engineering student. There is no system, no warehouse, just iron filings between fingernails and a chipped knife. He had to work in the scrap iron factory in Zunhua, starting from annealing, tolerances and vernier calipers, bit by bit, forging precision into this chaotic world. When "knowing the answer" meets "cannot figure out the process", when the numbering system hits the limit of the material——