William Lindesay, a British traveler and writer, has been exploring the Great Wall—one of the humans' most wonderful building projects. Not even a Chinese the Great Wall of China as well as he does. When he was a small boy, he planned to explore the Great Wall. Nobody it seriously. But Lindesay achieved his goal. Now he and works in Beijing, and his book, The Great Wall Explained, has come out. There're a lot of photographs and articles. It is welcomed by the readers. It was a brave trip on the Great Wall and he had already run 3, 000 kilometers along it! During those years, he got to many villages along the way. Friendly villagers helped him, although they didn't quite understand why the Englishman would such interest in the Great Wall.