How has china’s rugged terrain affected its relations with other countries and civilizations

The mountains on the west side of China made people to only live on the East side, therefore, the mountains blocked China off from the rest of Asia, meaning that you had to cross very dangerous terrain to trade or get to other areas of china. Since China was so untouched in that area, it was even more dangerous. Hope this helped! Have a good day and goodluck on your assignment! :) <3