In the final years of the Tianyuan era, the country suffers three consecutive years of drought. Farmers harvest nothing, the land is strewn with the bodies of the starving, and people resort to exchanging children to eat. Bones lie exposed by the roadside, left unburied. At the same time, the Mongol emperor Borjigin Erimuh, having unified the Mongols, personally leads six hundred thousand cavalrymen into an invasion from the north. They burn, kill, and plunder all the way, leaving fewer than one in ten of the country's people alive. In this age of chaos, our protagonist Qin Zhen unexpectedly transmigrates from the 21st century. A man of science and engineering with a higher education, he is about to use modern knowledge to change this world...
The writing is good, the war scenes are clearly depicted, and the main plot is clear. Unfortunately, except for the protagonist's time travel, the rest is on par with traditional military, and the subject matter is not novel enough.