Great Wall of China - An introduction (Hello China #47).

Cháng chéng. There is a long stretching wall in China called the Great Wall, Cháng chéng. With a length of more than 5,000 kilometers, Cháng chéng was built continuously over more than 2,000 years by Chinese people. The watchtowers would be lit up by torches if a watchman spotted an enemy invasion. Messages could be passed to the military center from one watchtower to another. Cháng chéng was expected to protect national peace. Constructing Cháng chéng would guard our own territory, and we won't infringe on other people's territory. It is not only a brick wall, but also one of the world's greatest historical architectural works. Cháng chéng.