Through the Great Ming, I Became the Chongzhen Emperor's Teacher?

Gao Qingyun was teaching in a mountain village when a car accident unexpectedly transported him to the late Ming dynasty during the Chongzhen era. He woke up with a disability, but fortunately, he awakened a Master System. As long as he teaches 100 students, he can regain his sight. However, while he thought he was still in the modern era, he had unknowingly altered the history of the Ming dynasty's downfall.

Natural disasters and man-made calamities? The Jian奴 (Jurchens) invading the borders? Traitorous ministers in power? ... By the time he opened his eyes again, the Ming dynasty had already stood at the pinnacle of the world, and he, Gao Qingyun, had become a man whom even the emperor had to pay respects to.