Zhang Qian, a diplomat during the Han dynasty, is sent from the capital city of Chang'an (Xi'an) to create alliances with and develop a trading route to the West. His success leads to the establishment of the first commercial land route between East and West.
development of the light, spoked wheel, horses came to be used to draw military chariots, remains of which have been found in tombs all across Eurasia
used camel, caravans and horse to carry goods
Buddhism begins to spread from India into Central Asia