Return to Jade Bi Gao Huan, Goal: to Eliminate Yu Wentai

When Chen Ji, a graduate student in the history department, opened his eyes, he was actually under the Yubi City in the fourth year of Wuding in the Eastern Wei Dynasty. He became Gao Huan, the commander of the defeated army who had just been shot through the back by an arrow from Yu Wentai. Qiang poison entered his veins, and the military doctor declared that he would not survive for thirty days. The ending has already been written in history books: Gao Huan was defeated by Yubi and died on his way home. But Chen Ji remembered another thing. Yu Wentai's 30,000 cavalry were encircling them. If they retreated according to history, the entire army would be annihilated. He used the parabolic formula he had memorized in his thesis to set up the first ambush, used the Pythagorean theorem to modify the trebuchet, and used the black powder formula to blow up the canyon pursuers. Yu Wentai went from ridicule to shock, from imitation to crazy pursuit, but he didn't know that his opponent still held half of the history of modern civilization in his pocket. On the night of the decisive battle at Heqiao, after the smoke cleared, Chen Ji found a letter in Yuwentai's military tent. There was only one sentence in the letter: "What year are you from?"