写一篇有关山西河曲景点的英语作文

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The Great Wall of China is a Chinese fortification built from the 5th century BC until the beginning of the 17th century,in order to protect the various dynasties from raids by Hunnic,Mongol,Turkic,and other nomadic tribes ing from areas in modern-day Mongolia and Manchuria.Several walls,also referred to as the Great Wall of China,were built since the 5th century BC,the most famous being the one built between 220 BC and 200 BC by the first Emperor of China