Sadly, most of my knowledge comes from kung fu movies and video games.
What I do know is very NOT CRAP and I suspect all of it with the exception of The Great Wall is similarly the same.

Guns and Roses are making a concept album that might 'fill in the gaps' for you...

If you're interested in Chinese history, you must explore the country...(it's not just about The Fucking Great Wall or some stupid Kung Fu movies !)
..........instead, you are stucked between some cheap bushy Chinese pussies in Hong Kong !