Six months too late but anyway...
The Qin (Chin) dynasty (221BC-206BC)- apparently the first unified, autocratic dynastic state in Chinese history. Emperor Qin Shi Huang supervised the construction of the Great Wall, burnt most of the books in his empire to prevent freethinking, and ordered the construction of the Terra-Cotta Army.
The Qing (Ching) dynasty (1644-1911AD)- established by the Manchus, a confederation of semi-nomadic non-Han Chinese tribes from north of the Great Wall (northeastern China). They instituted a form of apartheid over the Han Chinese, and imposed the wearing of queues as a sign of subjugation. For civ unit purposes the early Manchus have more in common with the Mongols than the Chinese.
Today the Han Chinese consider the Qin dynasty to be part of their heritage, but consider the Qing dynasty to be a conquest or foreign dynasty (which they were).