Da Qin: Returning to Twenty, I Killed the World

The thirty-seventh year of the First Emperor, Sand Dune Palace. The end of the eternal emperor's victory is approaching. When he is about to die, a future time traveler with the "Emperor Master System" descends from the sky and attempts to use the elixir of longevity to control the dying ancestral dragon. Ying Zheng smiled. The emperor's pressure breaks out, and physical suppression begins! He even exploited the system BUG by using the Daqin Guoyun card and forcibly deprived him of the highest authority! "Your system? It's mine now!" Ding! Redeem [Perfect Life Extension Pill] and return to your peak body at the age of twenty! Bite! Redeem [World Map] and [Modern Military Encyclopedia]! Ying Zheng, whose life span had increased dramatically, did not say anything about it, but just followed the trend and "died" in the sand dunes. He stayed behind the scenes and watched with cold eyes as Zhao Gao tampered with the imperial edict, watched as Hu Hai slaughtered his enemies, and watched as the remnants of the Six Kingdoms rejoiced... Just when everyone in the world thought that the Qin Dynasty was about to die and all the demons and demons had revealed their trump cards. The door of Xianyang Palace was kicked open! A twenty-year-old tyrant with the blood of a dragon, wearing black armor, and a Qin cavalry equipped with age-defying muskets descended on the court like a god! "Since everyone has jumped out, let's let the nine tribes have fun." In this life, I not only want to last for eternity, but also want the sun and the moon to shine on all the land of Qin!