Ancient Chinese for me please!

I think after reading everything on the ancient world, my favorite culture/people were the chinese. They had such interesting ways of ruling their land and had such amazing technology for their time. My favorite invention of theirs was most likely the way they ruled. I found it interesting that they split up their rulers into dynasties. My favorite dynasty was the Han dynasty because it was the first "calm" dynasty. Plus it sounds like Han Solo once ruled over China! What was your favorite chinese invention?