它是一道蜿蜒五千公里横跨中国北方的很长的城墙。
It is a long wall which runs more than 5,000 kilometres across northern China.
背起行囊，出发。途经318国道五千公里处标志碑，此路东起上海，到这里正好五千公里，五千公里即一万里。
Backpack, starting. 318 National road through the 5,000 km mark at the monument, the road east of Shanghai, where just five thousand kilometers, five thousand kilometers that is one thousand miles.
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