I Was Blind for Seven Years, and Ying Zheng Unified the Seven Continents?

Lin Luo was on his way to teach in a mountain village when he slipped and fell off a cliff. Though badly injured and left blind, he awakened the Master Teacher System. As long as he taught students, there was hope his sight would return. What he didn't know was that the era he found himself in had become the Great Qin, and every one of his students was a prince or princess... After seven years of diligently teaching, the moment his vision returned, he was completely stunned. "What? Ying Zheng united the seven continents? He really brought the whole world under one rule?"

Seven years earlier, Ying Zheng had said solemnly, "This is Great Qin." Lin Luo had chuckled. "You think I'd believe this is Great Qin, or that you're the First Emperor of Qin?"

Seven years later, Ying Zheng smiled. "This is Great Qin." Lin Luo gaped. "You really are the First Emperor of Qin! Pay me!"