Troubled Times in the Late Ming Dynasty

In the winter of the 11th year of Chongzhen, the Manchus invaded the south in two groups. It was as if they were entering uninhabited territory. The entire North China seemed to be undefended. More than 70 cities were attacked by the Manchus, and a population of 500,000, as well as countless livestock and property were plundered. Avoiding heavy troops all the way to Zhending Mansion, Li Shuang was originally the son of a fifth-rank soldier in Zhending Mansion who won the fifth rank of Lu County. By chance, his mind was occupied by Li Shuang, a history teacher from the 21st century. China is in ruins, China is in a state of turmoil, barbaric regression, and centuries of bullying. Li Shuang, who is familiar with history, is trying his best to stop all of this from happening! From then on, the hand holding the pen must learn to hold the knife, and the scholar who teaches people must learn to kill! If you want to survive in troubled times, you must abide by the laws of troubled times.