The great wall of China wall with a wide range of China defeated Fort ancient walls, mainly generated by the current in the Qin dynasty, in order to prevent invasions from present-day Hans Rat sayong tribes. Since Zhou dynasty (c. 400 years before Christ), because they come and invade China, along the northern border. Hsin wong on the building wall, tens of thousands of refugees along the border areas to prevent their invasions into mice sayong. After that, the wall has been created several times by another, but later had a strange tribes from Mongolia and Manchuria to invade their great wall of China successfully.