The story is stupid. Let us be clear about it. The MC was a well-educated adult the modern world, died and possessed a body in an ancient other world, somehow was blessed with the so-called X-ray vision and an Alienware laptop full of information. He spent time swaggering and doing other childish things, too boring they could kill you from boredom. He could have researched bombs, guns and ammos, and trampled over those lands. Fucking idiot.
Edit: He researched bombs, but relied on bloody ancient this, ancient that. China is indeed backwards—the more ancient, the better, holier, more advanced. In their worldview, the progenitors of humanbeings were gods, perfect beings, and in the future, humanbeings will be monkeys. So fucking stupid Chinks!