Five thousand years ago, the protagonist accidentally swallowed fragments of the "Fire of Civilization" during an ancient sacrificial ceremony. From now on, he will not age or die, but he is not invincible either - he will be injured, in pain, and weak, but he will eventually recover. He cannot leave any descendants. Everyone he loves will grow old. He cannot stay in one place for too long or he will be found to "not grow old."
He has been a soldier, farmer, businessman, scholar, doctor...
He met Qin Shihuang, Li Bai, Genghis Khan...
