Great Qin: Growing Potatoes from the Start, the First Emperor Begs Me to Come Out of Retirement

Ye Tian transmigrates to the Qin dynasty and becomes a farmer. He awakens a System, but it won't activate for three months! With the First Emperor on the brink of death, he devises ruthless schemes to purge the court and defeat the Xiongnu without bloodshed. But the System's mission turns out to be making him an official, while his neighbor Lao Wang finally reveals the truth: I'm Qin Shi Huang!