Introduction to Simatai: The Simatai Great Wall is famous for its "thrilling, dangerous and strange". It is 19 kilometers long and has a total of 35 watchtowers. It is the only section of the ancient Great Wall in my country that retains its original appearance in the Ming Dynasty. This section of the Great Wall has been Determined by UNESCO as the "Original Great Wall" and called "The Best of the Great Wall" by Great Wall experts, it is the most famous dangerous section of the Great Wall and the most photographed section in various Great Wall albums. The Great Wall is mostly built on dangerous peaks and cliffs. It is majestic and majestic, and its movement is extremely varied and rhythmic. In some places it stands almost vertically, and in other places it is almost suspended in the air. Climbing the Great Wall is like going up a "ladder to heaven" or crossing a "overpass".