Geomantic omen in northwest Beijing

At that time, it was mainly because people found that there was a contradiction between Tongzi River and the road when expanding the road, so the Construction Bureau decided to erase a corner in the northwest of Tongzi River. At that time, the northwest corner of the Forbidden City in Tongzi River was missing because of construction, not because of geomantic omen. In fact, the missing corner of Tongzi Hebei capital and the northwest of the Forbidden City is man-made. Someone once interpreted the lack of the northwest corner and the skew of the southeast corner of Beijing as the collapse of the sky in the northwest and the subsidence in the southeast. You should know that Feng Shui itself is a superstition, so there is no scientific basis. This idea makes people feel ridiculous in reality. According to the so-called geomantic theory at that time, some people called the lack of corner in the northwest corner the sky gap. It is said that ancient kings were influenced by feudal superstitions at that time, so they attached great importance to geomantic omen, and asked workers to pay special attention to these aspects when building palaces. However, we must know that the palaces in the Southern Dynasties, the Northern Song Dynasty and the Tang Dynasty all lacked the northwest corner, and only the Forbidden City in Beijing lacked the northwest corner. At that time, in order to understand these reasons, people began to take some measures. At that time, we can see from several satellite photos that Jishuitan to Xizhimen has always been a wetland in history. On the southeast side of this wetland, there is a very obvious trace of inclined wall. In addition, this inclined wall also has a trace pointing in the positive east-west direction. Not only that, at that time, from the geological structure map, there was an oblique fault from Erligou to Deshengmen. As can be seen from the traces of these city walls at that time, it was actually because the southwest corner of the north of the city was a right-angled building, and later it had to be changed into an oblique building because of the influence of wetlands and fault zones. The wall in the southeast corner of the outer city was not straight because of the influence of wetlands at that time, and it had nothing to do with the so-called geomantic theory. The lack of the northwest corner of Tongzi River is due to the contradiction between the expansion road and the river course during the Republic of China, and the Construction Bureau decided to erase the northwest corner.