What are the primary functions of Great Wall of China-Annieli tours

Tourist’s Question:What are the primary functions of Great Wall of China?

Annieli tours’s Beijing Tour Guide Answer:
In the ancient China, people often suffered the northern nomadic attack,so Great Wall of China was mainly used to defense.
The 2nd function of Great Wsll of China was developing the Silk Road.Silk Road linked China with the west in ancient times.During the rule of Kublai Khan, a lot of Europeans began venturing towards China along the Silk Road.
The 3rd function of Great Wll of China was developing the farmland .
The 4rd function is resist the mice’s attack.(joke)

                                              Wrote by Annieli tours’s Beijing Tour Guide