The Great Wall, symbolizing China's ancient civilization, is one of the most splendid ancient construction wonders of the world. For many years ,the Great Wall as a military defensive project, kept out the invading troops of the northern nomadic tribes. From your handbook u can see, the Great Wall is just like a giant dragon crossing the northern part of China from west to east.

So, how did the Chinese people create such a great wonder? We need to look back to its history.

Construction of the Wall first began in the 7th Century BC called Spring and Autumn Period. The first section of wall ,that appeared in China ,was built by the Qi Kingdom and the Chu Kingdom. They had a high wall called "square wall" or "square city" built surrounding their own territories to defend the attacks of their neighboring enemy.

Its construction continued throughout the Warring States period in the 5th Century B.C.. All the kingdom followed the example of State Qi and State Chu,and had series of high walls constructed around their own territories for self-protection.