I'm sure that everyone heard about this wall but here is few words about it. The Great wall of China is a series of stone and earthen fortifications in northern China, build to protect north borders of the Chinese Empire against intrusions by various nomadic groups such as the Xiongnu from the north and rebuilt and maintained between the 5th century BC and the 16th century.ce the 5th century BC, several walls have been built that were referred to as the Great Wall. One of the most famous is the wall built between 220–206 BC by the first Emperor of China, Qin Shi Huang. Little of that wall remains; the majority of the existing wall was built during the Ming Dynasty. The Great Wall stretches from Shanhaiguan in the east to Lop Nur in the west, along an arc that roughly delineates the southern edge of Inner Mongolia. 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 (5,500.3 mi). This is made up of 6,259.6 km (3,889.5 mi) of sections of actual wall, 359.7 km (223.5 mi) of trenches and 2,232.5 km (1,387.2 mi) of natural defensive barriers such as hills and rivers.
And some scientist from china said that secret of wall's quality and long life is in stikcy rise thats is used to keep huge stones, with some other materials. more about china wall at wiki here.
This postcard is last one i recived on postcrossing.com thats nomber 8. cause is toped with official sending and reciving cards for some time
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