Please you combine your geographic knowledge and find relevant information to find out what were the three main upper routes between Europe and Asia in the ancient history of the world? The trade cent

Please you combine your geographic knowledge and find relevant information to find out what were the three main upper routes between Europe and Asia in the ancient history of the world? The trade centers at that time were in The trade center Mediterranean Sea

The main trade routes Southern Silk Road (from Yunnan ----)

Northern Silk Road (South Road - from Yumen Pass - Hexi Corridor - Central Asia - West Asia) North Road

And the Mediterranean Trade Circle, from the west coast to the east coast

Baltic Trade Circle

Arab Trade Circle