I, Shan Ya, Give the First Emperor an Elixir of Immortality from the Start

[From myth to legend, from China and abroad, from ancient to modern, you’ll find everything you love here.] Chen An is an ordinary wage earner who has been diagnosed with terminal brain cancer. By chance, he awakens the [Heavenly Fate Black Book], which can travel through time and space. As long as he completes the book’s impossible missions, he can obtain the “Heavenly Fate Authority” of great historical figures. But when he opens the first page, he’s completely stunned. [Mission: Give Qin Shi Huang the genuine elixir of immortality.] [Reward: The First Emperor’s “Ancestral Dragon Qi”!] “System, are you serious? If I give him the elixir of immortality, won’t the Ying clan rule the world until the end of the universe?” [Temporary ability: Jing Ke’s Assassination (1 use).] [Jing Ke’s Assassination: Instantly gain the power of the assassin Jing Ke’s “dagger revealed on the map.” You’ll have one chance to carry out a perfect assassination or escape.] … Inside Xianyang Palace, Ying Zheng surveyed the world and asked Chen An, who stood before him, “You’ve earned merit by presenting the elixir. What reward do you seek?” Looking at this emperor of the ages, Chen An smiled. “No reward needed. I’m going to see Xiang Yu in a bit.” Ying Zheng: “???”