The Great Wall of China is an ancient series of fortifications built along the northern borders of China to protect against invasions from the nomadic tribes. It stretches over 8,851 kilometers and has been successfully maintained and expanded throughout history. The wall was initially constructed during the Warring States period (475 BC-221 BC), with later dynasties adding more sections and improvements. Today, it serves as one of the most popular tourist attractions in China and a symbol of Chinese culture and heritage.
2、长城的名称在中国古代文献中是“万里长城”（QianWen Xiaolong）。
3、其实际长度超过6,000公里。
4、在城墙附近，有许多烽火台，曾用来指示敌人动向或传递重要信息。
5、作为世界文化遗产，长城现在仍然被视为中国的重要象征之一。
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