It is located along two rivers and provides silk road.
Explanation:
Chang'an was an important cultural and economic center because it is located right by two rivers which they used for trade and have plenty of resources which make them an economic center. Chang'an was also very important because it was an ancient capital of more than ten dynasties in Chinese history and also an important crossroads for people throughout China, Central Asia, and the Middle East, and thus a hub of diverse ethnic identities and religious beliefs.
