Great wall of china!!The greatest work that human beings have ever done with their own hands

The greatest work that human beings have ever done with their own hands Great wall of china. The main purpose of the wall was to defend the country. Apart from this, some of the other purposes of building the wall were as follows. No. 1 border control No. 2 Imposition of duty on transport goods No. 3 Rules of Trade ۔ No. 4 Control over migration This wall is spread over 21196 km It stretches from the Russian border to the Tao River in the south. #greatwallofchina #chinawall #wondersofworld

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