What is the cultural value of the Great Wall?

As one of the landmark buildings in China, the Great Wall has many cultural values. First, it is a masterpiece of China's ancient military defense engineering, representing the high development of China's ancient civilization and engineering technology. Second, the Great Wall is a symbol of China's excellent cultural tradition and represents China's spirit of unity, struggle, wisdom, tenacity and courage. Thirdly, the Great Wall has important historical and cultural value. It records the ancient history and cultural traditions of China and has become one of the tourist attractions that tourists all over the world yearn for. Generally speaking, the Great Wall, as a cultural symbol and heritage, is not _