to protect themself from their enimies
The Great Wall of China no longer serves its original military purpose, but it is a tourist attraction, so in that sense it still has a use.
Much of it is still standing. It is not longer in use as a defense against invasion.
the great wall of china is not in use because the have no more enemy at this point
Of course they did!
tourist attraction
A Hammer
limestone
china built the great wall of china, the grand canal, and many other things that we use today
china has a wall of china
great wall of china
the grerat wall of china is in china
The great wall of China is the longest wall in the world, some astronauts have even claimed to see it from space.