Iron Bones of the Ming Dynasty: in the Last Years of Chongzhen's Reign, I Sealed the Borders

Protagonist: Shen Mu Original identity: Graduate of modern military academy, history enthusiast, reserve soldier Time Travel Identity: A hundred households in a guard station affiliated to Kaifeng Prefecture in Henan Province (sixth grade, low-level general, with more than 50 remnant soldiers under his command) Time: Winter of the 16th year of Chongzhen Location: Around Kaifeng Prefecture in Henan Province (after Li Zicheng encircled Kaifeng, the land was thousands of miles long and rogues were everywhere) Female protagonists: Su Wanqing, Qin Hongying, Lin Wanqiu, Zhu Mingyue (all loyal, all useful)