长城是中国古代的一项伟大工程，也是中国最著名的景点之一。长城建于公元前7世纪，是为了保护中国的北部边境而建。长城的总长度超过13000英里，是世界上最长的建筑物之一。长城的建造需要经过数百年的时间和巨大的人力和物力，但它最终成为了一个不可动摇的屏障，保护了中国的领土和文化。

The Great Wall is an ancient and magnificent engineering project in China, and also one of the most famous attractions in China. It was built in the 7th century BC to protect the northern border of China. The total length of the Great Wall exceeds 13,000 miles, making it one of the longest buildings in the world. The construction of the Great Wall required hundreds of years of time and enormous human and material resources, but it eventually became an unshakable barrier, protecting China's territory and culture.