China's Great Wall wonder of the world

The only teacher, which was built rights and can preview the space, but a Chinese space "Yang Liwei" lie of this statement, it was dense vegetation surrounding fence and thickness does not allow to see him. Despite all the efforts made by Chinese rulers to end construction, the fence does not have the required task in defending the country against attacks by the nomadic peoples (barbarians). Only invasions by the emperors kings "Zheng", who in turn were descended from one of these people, allowed the country's elimination of these threats.