长城简介(英文)六年级用!越短越好!短!简单点,不要太复杂.

The Great Wall
The Great Wall is very wonderful. It is in North China. It's more than 6000 kilometers long.It's about 7.5 metres tall. It was built up with earth,brick and stones. It started building in 7th Century BC. That time was in Qin Dynasty(about 221 to 206 BC). The purpose of the wall was to keep out invaders. It is one of the most popular tourist destinations in the world. Every year a lot of people from all over the world come to visit it. It is one of the seven great wonders of the world. Welcome to visit the Great Wall!