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The Great Wall, a symbol of China, is a series of fortifications made of stone, brick, tamped earth, wood, and other materials. It was built along the northern borders of China to protect the Chinese states and empires against the raids and invasions of the various nomadic groups of the Eurasian Steppe. The Great Wall stretches from Shanhaiguan in the east, to Lop Lake in the west, along an arc that roughly delineates the southern edge of Inner Mongolia, but stretches to over 15 provinces. The earliest known construction of the wall began in the 7th century BC, and it was later joined and fortified during the Qin Dynasty (221–206 BC). The Great Wall has been rebuilt, maintained, and enhanced over various dynasties; the majority of the existing wall is from the Ming Dynasty (1368–1644).

Made a World Heritage Site in 1987, the Great Wall of China is one of the most impressive architectural feats in history. The wall is not a single continuous structure, but is made up of many interconnected walls, some running parallel to each other, while others are at right angles. The Great Wall has watchtowers and barracks, making it a formidable military fortification.

While the Great Wall never effectively prevented invasions, it did slow down the progress of invading armies, making it easier for the Chinese states to identify and respond to threats. Another function of the wall was to control immigration and emigration, allowing the imposition of duties on goods that were transported along the Silk Road.

Today, the Great Wall is a popular tourist attraction, with millions of visitors from around the world coming to see this ancient marvel. The most heavily visited section of the wall is near Beijing, but there are many other sections that are less crowded and offer a different experience of the wall and its surrounding landscape. Walking on the Great Wall and taking in the breathtaking views of the Chinese countryside is an experience that should not be missed.

The Great Wall of China not only represents the architectural and engineering achievements of ancient China, but also serves as a stark reminder of the historical importance of defense and security for the Chinese people. It is an enduring symbol of resilience and determination and continues to captivate and inspire people from all over the world.

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