Is the Great Wall of China a wall or a fence? My friend is a little confused and needs your help!?

The Great Wall of China is a series of fortifications made of stone, brick, tamped earth, wood, and other materials, generally built along an east-to-west line across the historical northern borders of China to protect the Chinese states and empires against the raids and invasions of the various nomadic groups of the Eurasian Steppe

Great Fence of China? No, it's a wall. It does kind of have smaller stone fences on top of the wall.

See a pic here https://en.wikipedia.org/wiki/Great_Wall_of_China#...

Its a wall,the clue is in the name.

"Great Wall of China"

not

"Great fence of China"

If they're confused, why don't you help them out by telling them the facts?