GEOGRAPHICAL SETTING
ANCIENT SEA - ROUTE BETWEEN CHINA AND THE WEST
1. the overland silk route
2. the sea route running through the Straits of Malacca.
a. When the Chinese were too weak to control the fierce nomads who roamed Central Asia, they concentrated on the sea route.
b. When the empire was powerful and the tribes were peaceful, they favoured the overland route.
BREAKDOWN OF THE ROUTE BETWEEN CHINA AND THE WEST
PERIOD OF INDIANIZATION