http://www.mitchellteachers.org/WorldHistory/AncientChinaCurriculum/Images/handynasty/maphandynasty_large.jpg

This map is showing the Han Dynasty at its prime.  The Red is showing the territory that the Han Dynasty ruled.  The black line shows the borders of todays China.  The Han Dynasty takes up about half of todays China.  The great wall of China stood at the top of the territory.                                           

The silk road ran right to the heart of the territory.http://www.monkeytree.org/silkroad/travelerimages/han.map.jpg