It now stretches 8, 851.8 km (5, 500.3 mi), with approximately 2, 232 km of that natural barriers such as hills and rivers.
现在长城长8,8851.8千米，其中约2232千米是像山丘、河流的天然屏障。
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The most comprehensive archaeological survey, using advanced technologies, has recently concluded that the entire Great Wall, with all of its branches, stretches for 8, 851.8 km.
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