1 SILK ROAD — Routes across the dry west 2 GREAT WALL — Defending the northern frontier 3 ANYANG — A centre of Shang power 4 XI'AN — Qin and Han heartland 5 YANGTZE MOUTH — River route to the sea 6 SOUTHERN SEA ROUTES — Trade by water 7 NORTH CHINA — Plains, rivers and capitals TAKE A CLOSER LOOK START HERE