Teaching Math and Science to the Great Monsters of the Classic of Mountains and Seas

Four people transmigrate: one becomes fabulously wealthy, one wields power over the court, and one rules the harem. Only the protagonist drifts through the martial world, bringing it far too much sorrow and grief!

The protagonist, Zhang Fei, taps a Pig Demon on the head with his knife and asks, “Have you finished your math workbook?”