Why is the northwest corner of Beijing City Wall alone? Is it a mystery or another reason?

Beijing is the capital of China and the famous ancient capital of the Six Dynasties. Beijing is located at the northern end of North China Plain, surrounded by mountains and rivers. This is an ideal place to build its capital. In ancient China, symmetry was regarded as a respect for beauty. As an imperial capital, the ancient city of Beijing has square walls, but no northwest corner. Why?

There is a saying in China ancient geomantic omen: the northwest is the gap. It is said that there is a mountain supporting China in eight directions. The mountain in the northwest is called Buzhou Mountain, which means? Not crossing? . The northwest corner of the Forbidden City cannot be built.

Another view is due to the mistakes of craftsmen: it is said that when Beijing built the city, the city walls were designed in strict accordance with the rectangle. The craftsmen tried their best to put the diagonal of the rectangular wall on the golden hall of the Forbidden City to show the glory of the emperor in the past five years. However, due to construction mistakes and natural reasons, it still deviated from the Forbidden City. In order to avoid death, craftsmen had to erase the northwest corner.

Why is there only one corner missing in the northwest corner of Beijing? There is such a secret hidden inside. Another way of saying it is that when the city wall was built, it was originally built at right angles, but it collapsed soon after it was built. The emperors of Ming and Qing dynasties ordered reconstruction many times, but it always collapsed soon after it was built. So we had to erase the northwest corner, and it became the ancient city wall that people see today.

Some people think that the northwest of Beijing is blocked by mountains, and the northwest corner is erased, avoiding mountains. There are underground ditches in the northwest. Even if the wall is built, it will collapse. In order to avoid ditches and prevent collapse, the northwest corner was smoothed.

In recent years, some geologists have discovered a fault zone parallel to the city wall, which is close to the outside of the northwest corner of the city wall. Accordingly, some geologists put forward a hypothesis that the northwest corner of the city wall may be built at right angles when it was just built, but in this way, the northwest corner of the city wall just passes through the fault zone. Because the foundation is formed on the broken zone, the cracks are likely to have some weak activities and the stability of the wall is greatly weakened. Perhaps it was because it collapsed many times that it was rebuilt into the present city wall. In this way, the wall also cleverly avoids breaking and can stand for a long time.