There is a cemetery in Ganling, which was chosen by Li and Yuan Tiangang in the prosperous Tang Dynasty. At that time, when Wu Ze was buried, the items buried with him seemed to exceed the national treasure's 1/3. So the value of Wu Zetian's tomb is really hard to measure. And the number of treasures inside is naturally incalculable. Therefore, Wu Zetian naturally attached great importance to choosing the mausoleum, otherwise she would not choose Yuan Tiangang to choose the cemetery for her.
Wu Zetian really attaches great importance to her own characters. So Yuan Tiangang naturally also dare not slack off. It is said that he has looked for many places, and the first place he looked for was the Yellow River area. However, in the Yellow River area, because of the climate, schools are not a good choice as cemeteries. Then he went to Guanzhong area. But he still hasn't found a suitable cemetery there. After that, Yuan Tiangang went out at night and had no intention of observing the celestial phenomena. Found a purple mountain. Zhou leisurely sits on a three-wheel chess game, which coincides with the Big Dipper in the sky. Taking this scene, Yuan Tiangang concluded that this place is the safe place he has been looking for, and it is also Ganling. First, he took out a copper coin as a mark to look for it in the future, and isolated the purple gas from the outside world.
Besides, the tomb builders did not live up to people's expectations. There are historical records. Many civil uprisings in the Tang Dynasty. Because of lack of financial resources, when trying to steal money, Ganling treasures were defeated. It can be seen that Ganling is dangerous or has strong guarding ability.