As we all now, Qin Shih Huang is the first emperor of China. He united several states around his Chin Empire and therefore formed "China". But his desires didn't end there. He feels like he is the son of heaven on Earth and he basically craved for immortality, which he got by taking mercury pills, which drove him crazy.
Moreover, he asked for the construction of a life-size model of his army, which can be used to "guide him" in the case he dies. Add to that his will that all the people who see his funeral be trapped in his tomb complex.
He is a really weird emperor, but hey, he united China. It was a big task, but he successfully did it. He didn't use the right methods though.
By my last sentence I could say that he wasn't a good emperor. If only he used better methods...