The Most Powerful Bookkeeper of the Three Kingdoms

In troubled times, rice is expensive and living is hard to come by! Guo Wei: Old man, let your baby come to my private school. The price is fair and you won't be bullied! Old Man: A good baby in our village can herd cows at the age of 3, drive ducks at the age of 4, collect firewood at the age of 5, cut grass at the age of 6, go to the fields at the age of 7, and become a strong laborer in the family at the age of 8. Then he needs to be educated and literate. Can he herd better cows, drive better ducks, collect better firewood, cut better grass, and cultivate better land? Guo Wei: Absolutely not! What should I do? What he said was so reasonable and shameful. I seemed to be convinced! Is there any mistake? You are just a passerby who doesn't even have a name. Do you need to be so eloquent? Guo Wei is industrious, indifferent to grains, poor and ignorant, and comes to the troubled times of the Three Kingdoms. He grows up with the times. Can he leave his mark on the times?