After traveling through the Qin Dynasty and becoming a prisoner, Chen Yan took the most dangerous path: working for Qin Shihuang and making reforms within the system.
Li Si regarded him as a rare soldier, Meng Tian regarded him as a commander, and the First Emperor used and guarded against him. And his real plan was to back up the knowledge of civilization to a place where Qin Shihuang couldn't find it before the empire collapsed.
When the news of the Dune Change came, he burned the last drawing of Afang Palace and said: "History can be rewritten, but civilization must continue."