سور الصين العظيم - المعرفة
^China's Great Wall Found To Measure More Than 20,000 Kilometers". Bloomberg. 2012-06-05.Retrieved 2012-06-06. ^ 10,000 li = 6,508 kم (4,044 ميل). In Chinese, 10,000 figuratively means "infinite", and the number should not be interpreted for its actual value, but rather as meaning the "infinitely long wall". ^ The New York Times with introduction by Sam Tanenhaus (2011).