| 1 | The wall was built by stamping earth between board frames. | |
| 2 | The place where typography was probably invented in our country was the Huanghe river region. | |
| 3 | The west part is a rammed earth construction, about 5.3 meters high on average. | |
| 4 | The research gives prominence to three main way of using earth, they are mould board building, rafter building, and earthen brick building. | |
| 5 | In the eastern part, the core of the Wall is rammed earth as well, but the outer shell is reinforced with bricks and rocks. |
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