The construction types of the Great Wall is actually quite complex. In the early stages, the wall was built using local materials, resulting in various types of walls such as earthen walls, stone walls, brick walls, and wooden barriers.

In addition, few people know that there are also some "mountain barriers" and "water barriers" that are part of the Great Wall. When encountering difficult and impassable mountain terrain, ancient people chose not to build the wall but instead utilized the natural form of the mountains to achieve a defensive purpose. Similarly, some "water barriers" are also considered part of the Great Wall.