The Great Wall is the longest building in the world. It begins from Shanhaiguan and ends at Jiayuguan, (cover) more than 6,000 km. It was built to prevent the enemy from getting into the Central Plains. The completion of the Wall (take) a long time. Its first section was built in 7th century BC. After over 2,000 years rebuilding and connecting different sections thus came the present Great Wall.
The best (preserve) section is at Badaling, which is also the best place to appreciate the greatness of the Great Wall. (it) three parts, namely the pass, the wall and the watchtower, were once greatly significant. The Chinese saying: "If one man guards the pass, 10,000 are (able) to get through." shows the importance of the pass. The wall is the main part. During the ancient war time, those soldiers (brave) defended the border on the wall. There is a watchtower every several kilometers used to pass military information.
a historic site, the Great Wall symbolizes for Chinese people courage, strength and strong will. So, there's a Chinese saying: "Hehas never been to the Great Wall isn't a true man."
In 1987, the Great Wall (list) on the World Heritage List.