Why can't ten thousand people dig the tomb of Wu Zetian?

This matter has to start with the construction of Ganling. Ganling is located on Liangshan Mountain, 6 kilometers north of Ganxian County, Shaanxi Province, and 76 kilometers away from the ancient city of xi 'an. It was built in 684 AD, and it took 23 years for the project to be basically completed. Liangshan is a naturally formed limestone peak, with three towering peaks, the highest in the north, with an altitude of 1047.3 meters, and the lower in the south, with an east-west direction. At that time, the masses called it "Nitou Mountain". Looking from east to west of Ganling, Liangshan is like a woman lying on her back, with the north peak as the head and the south two peaks as the chest. People often say that it is a wonderful symbol of Empress Wu Zetian. Mr. Feng Shui, a Feng Shui master in the Tang Dynasty, thought Liangshan was very beneficial to the hostess. So Wu Zetian chose Liangshan as her husband Tang Gaozong and her "eternal domain" after a hundred years. After Tang Gaozong's death, Wu Zetian asked Yuan Tiangang and Li, famous magicians in the ruling and opposition circles at that time, to choose the site for the emperor. They traveled around Kyushu respectively, and when they came back, they all said that they chose Liangshan in Qi Hao County, Jingan County. Wu Zetian sent envoys to inspect. At the top of Liangshan Mountain, Yuan Tiangang said that he buried a copper coin here, and Li said that he ordered an iron nail here. Digging the ground, Li's nail was just inserted in the copper square hole buried by Yuan, and everyone present applauded in surprise. So Wu Zetian chose the mausoleum site in Liangshan, which is now the dry mausoleum. As far as geomantic omen is concerned, Ganling surpassed all the imperial tombs in the Tang Dynasty.

When Ganling was built, it was in the heyday of the Tang Dynasty, with strong national strength, grand cemetery scale and magnificent architecture, and was called "the crown of emperors' tombs in past dynasties". At the beginning of the Tang Dynasty, Li Shimin, Emperor Taizong, learned from historical lessons that there was no immortal country and no grave to dig. Starting from Zhaoling, he and his eldest grandson created a burial system with mountains as the tomb, which was designed by famous artists Yan Lide and Yan Brothers at that time. Tombs are made up of buildings and sculptures, and they are scattered on the mountains with the trend of "Dragon Board Phoenix". The dry tombs of Tang Gaozong and Wu Zetian developed and perfected the shape of Zhaoling. The cemetery is modeled after Chang 'an, Tang Dou, and is divided into Imperial City, Miyagi City and Outer Guo Cheng. The north-south main axis is 4.9 kilometers long. According to documents, there are two original city walls in the "Eight Miles a Week" of Ganling, and four city gates in the inner city, namely, Dongqinglongmen, Nanzhuquemen, Xibaihumen and Beixuanwumen. According to the investigation by archaeologists, the inner city of the cemetery is square, with a length of 1450m from north to south, 1582m from east wall and 1438m from west wall, with a total area of about 2.3 million square meters. There are many magnificent buildings in the city, such as 60 courtiers, such as the memorial hall, wing, cloister, Quelou and Di Renjie, as well as the ancestral temple and Xiagong. As for the treasure inside, after years of exploration and investigation, a cultural relic worker estimates that there are at least 500 tons! There are four caves on both sides of the front and rear passages, which are filled with the most valuable treasures of the Tang Dynasty. On both sides of the nearly 100-meter corridor leading to the King Kong Wall, there are various gold and silver ritual vessels. What interests the world most is the Preface to the Lanting Pavilion, a top national treasure. According to historical records, the Preface to the Lanting Pavilion said in Li Shimin's testamentary edict that it should be placed under his head. In other words, this treasure should be in Zhaoling, not Ganling. However, Wen Tao, the secretariat of Yaozhou in the Five Dynasties, stole Zhaoling, but there was no Preface to Lanting in his list of unearthed treasures, so nine times out of ten, the Preface to Lanting was hidden in Ganling. In the folk rumors around Ganling, it has long been said that the preface to Lanting was buried with Wu Zetian.