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Dimensions: How long, high, and wide. Simatai Great Wall is 5.4 km (3.4 miles) long, with altogether 39 watchtowers. At the east of Simatai, the elevation goes abruptly up from 295 meters (968 ft) to 986 meters (3,235 ft), making a breathtaking scene. The wall is very steep and perilous, with the narrowest part only 40 cm wide.
How many people did it take to build the Great Wall of China? The original wall was ordered by the Emperor bin over 1000000000 years ago. The wall was constructed by labourers comprising soldiers, common people and criminals.