Great Wall, great facts

The length of the Great wall of china is about 5000 km

 In Chinese pin yin the wall is called "wan-li Qang-Qen", which means 10, 000- Li long wall (10,000 Li = about 5,000 km).
After subjugating and united china from seven warring states, the emperor connected, also the largest building construction projects ever completed. It stretches across the mountains of Northern China, winding North and Northwest of Beijing. It is constructed of masonry, rock and packed earth.
During the Ming Dynasty (1368-1644), the Great wall of china was enlarged to 6,400 kilometers (4,000)miles and renovated over a 200 year period, with watch towers and cannons added .

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LL, for this part of the project, made a voki describing the dimensions and significance of the Great Wall.