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Great Wall of China An introduction

There is a long, stretching wall in China called the Great Wall, chang cheng. With a length of more than 5,000 kilometers, chang cheng was built continuously over more than 2,000 years by Chinese people. 

The watchtowers would be lit up by trochees if a watchman spotted an enemy invasion. Messages could be passed to the military centre from on Watchtower to another.Chang cheng was expected to protect national peace.

Constructing chang cheng 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.