Ladies and Gentlemen.
Welcome to the Great Wall. The Great Wall, which is more than 6,000 kilometers long, is the longest wall in the world. It has a history of more than 2,000 years. It is made of stone and bricks and almost all the construction was done by hand without any machine. As the wall was built to defend the country against foreign invaders, there were watchtowers every few hundred meters along the wall. Now, the Great wall is one of the most famous places of interest in China and it attracts many visitors every year.
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