One is feng shui. China paid attention to geomantic omen in ancient times, especially the imperial tombs. The emperor is the real dragon emperor. When building a tomb, Long Mai is usually set first, and then the burial place is determined according to Long Mai, which is often referred to as dragon-seeking needling. The shape of a dragon is generally winding, similar to a mountain shape. Therefore, imperial tombs are generally surrounded by mountains and waters, paying attention to mountains as dragons and water as veins. Mountains are connected with mountains, symbolizing the endless life of future generations; Accompanied by water, it symbolizes the blessing of ancestors and nourishes future generations. After Long Mai was decided, the next step was to look for the ancient tomb. The key to selecting acupoints is "Qi". The ancients believed that qi still existed after death. So the tomb must be chosen in a place where the wind gathers. Surrounded by mountains in the back and winding water in the front, it is an excellent place to gather gas.
The second is solid. Geomantic omen is only spiritual comfort or positive psychological suggestion, and it cannot guarantee the safety of the imperial tomb. Therefore, in order to ensure the safety of imperial tombs and prevent them from being patronized by grave robbers, emperors of all dynasties have set up special institutions to take charge of the safety and repair of imperial tombs. However, with the disintegration of imperial power, the institutions responsible for guarding the imperial tomb fell apart, or ignored it, or stole it, or even colluded with grave robbers to steal the imperial tomb. If the firmness of tombs is an important factor to ensure the safety of tombs, then the concealment and firmness of tomb gates are the most important. How to ensure that the tomb is hidden and firm? It depends on the mind of the designer and the sense of responsibility of the craftsman.
Therefore, Ganling was built so indestructible to protect the safety of the imperial tomb. After all, there are countless treasures in the imperial tomb, and there are also many history books about dynasties. Once lost, the consequences will be unimaginable.