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It took millennia to build, but today the Great Wall of China stands out as one of the world’s most famous landmarks. The Great Wall of China is the world’s largest wall and the biggest ancient architecture. The official length is 21,196.18 km and the Great Wall is more than 2,300 years old.

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Since 1644, when the Ming Dynasty was over thrown, no further work has been done on the Great Wall. The Great Wall reconstruction and protection began with Badaling in 1957. The Great Wall is not a continuous line: there are side walls, circular walls, parallel walls, and sections with no wall. The Northwestern Great Wall section in Gansu and Ningxia are likely to disappear in 20 years, due to desertification and change in human land use. The most famous section of the Great Wall is Badaling because it’s been visited by VIPs from around the world.

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