[00:00.00]2.1 The Great Wall is the name for a wall. [00:09.68]It first comes from the time [00:11.76]of the Qin Dynasty. [00:13.84]Shihuangdi of th Qin Dynasty united China [00:17.26]in 221 BC. [00:20.48]He wanted to protect China's northern border....
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