I Use the Sky Curtain to Change My Fate Against the Will of Heaven

After history is spoiled by the sky Chu Yan travels through the Qin Dynasty and tests the poison for Qin Shihuang in the beginning. The giant screen suddenly cracked in the sky: [The First Emperor died, Zhao Gao was in chaos, and the Second Emperor of Qin died! The entire Xianyang Palace was as silent as death. Chu Yan watched the sword on the First Emperor's waist shaking into a sieve. But the giant screen suddenly switched: [Chu Yan, graduate student in the Department of Modern History, graduation thesis "On the Inevitability of Peasant Uprising in the Late Qin Dynasty"...] "Take this beast!" Meng Tian's sword was already placed on his neck. The giant screen continued to play: [Xiang Yu burned Epang Palace, Liu Bang made three chapters...] Chu Yan laughed wildly in the prison car: "Your Majesty! Tianmu said that I can help you change your destiny against the will of heaven!" ——Later, Chu Yan found out that this show specially revealed key points in history. On the eve of the Xuanwu Gate Incident, Tianmu broadcast a live broadcast of the brothers killing each other to Li Shimin. In the thick fog of Chibi, the sky screen showed Cao Cao the Burning Battalion. He rewrote history again and again, but he didn't know that at the end of the sky, a pair of eyes were watching coldly...