After I Transmigrated to Great Qin and United the Six Kingdoms, I Began Cultivating Immortality

I woke up to the sound of people wailing at a funeral. I'm done for~ I transmigrated into the First Emperor! Who else can top that? The emperor System that's a must-have for transmigration? Not for me! I'm a man who has left behind all lowly pleasures, because my life has no fun left in it… At the start, I'm defined by one word: weak. Weak enough to overcome the strong. I lack the strength, so I'll make up for it with brains~