写一篇有关长城的英语作文（60词左右）

The Great Wall of China is a Chinese fortification built from the 5th century BC until the beginning of the 17th century, The Location of the Great Wall is in northern China. It'信颂悔渣s lenght is over 6,000 kilometers or 12000 li, so it is called "滑前郑wan li chang cheng". The everage height of wall is 7.5meters(25feet). The main materials are earth,brick and stone. It had been building since 7th century BC. The purpose of the Great Wall is to keep out invaders in the ancient.Nowaday, the Great Wall can't be a defense, but a scene attracting people from all over the world. in order to protect the various dynasties from raids by Hunnic, this wall was located much further north than the current wall built during the Ming Dynasty, and little of it remains.
The Great Wall of China was originally a project of Qin dynasty designed to keep out the nomadic Xiongnu invaders from the north. Some of the wall was built during the Qin, but most of it that we see today was constructed during the Ming dynasty.

The Location of the Great Wall is in northern China. It'逗贺s lenght is over 6,000 kilometers or 12000 li, so it is called "坦指银让宴wan li chang cheng". The everage height of wall is 7.5meters(25feet). The main materials are earth,brick and stone. It had been building since 7th century BC. The purpose of the Great Wall is to keep out invaders in the ancient.Nowaday, the Great Wall can't be a defense, but a scene attracting people from all over the world.