To say that the imperial tomb in China has attracted the most attention is the mausoleum of Qin Shi Huang, the first unified emperor of China. He laid the basic pattern of China's political system for more than two thousand years, and was also praised by the Ming Dynasty thinker Li Yan as an emperor throughout the ages. His imperial tomb should be the largest of the ancient Chinese imperial tombs, but there is a lot of mercury in the mausoleum of qin shi huang, which can be seen from the pomegranate trees growing on the mountain.

Located at the northern foot of Lishan Mountain, 5 kilometers east of the city in Lintong District, Xi'an, Shaanxi Province, the Mausoleum of Qin Shi Huang was built from the first year of the reign of King Zheng of Qin (247 BC), the year in which Qin Shi Huang ascended the throne. Even later, Qin Shi Huang's conquest of the Six Kingdoms did not stop, taking 39 years until the second year of Qin II (208 BC) was completed. Imperial tombs are generally selected in places with beautiful scenery, the scenery is not beautiful enough, and the emperor also cares about feng shui. So in the end, the mausoleum of Qin Shi Huang broke away from the mausoleum of his grandfather and father, and chose the place of Lishan Mountain in the south and Weishui in the north, and it is not a good place to have mountains and water.
His mausoleum was also ceremonial, and the tombs of his elders, King Zhaoxiang of Qin, King Xiang of Qinzhuang and Empress Dowager Qin Xuan, were all west of Lintong County, so Qin Shi Huang, as a junior, had to be buried east of Zhiyang. The person in charge of the construction was Lis, who recruited a total of 720,000 people, close to 800,000 at the most, which is almost eight times the number of people in the Pyramid of Khufu. It is no exaggeration to say that it is the largest project and the largest mausoleum in history. In fact, when it was finally completed, it was actually not yet completed, but at that time, Chen Sheng wu guang had already hit a very close place to the cemetery, and Zhang Handan had to hurry to complete the project and take the people who repaired the mausoleum to resist the rebel army.
In the past, there were many people who wanted to open the mausoleum of Qin Shi Huang, and in the first year of Qin Zi 's baby (206 BC), After Xiang Yu attacked Guanzhong, he destroyed the buildings on the ground, and it is said that the underground palace was also moved. However, in order to win the hearts and minds of the people, Liu Bang later ordered the protection of the mausoleum of Qin Shi Huang. Every subsequent dynasty ordered that the mausoleum of The First Emperor of Qin must be protected, and at first Liu Bang also arranged for several families to live nearby as tomb keepers. But even so, there are still many people who want to steal the tomb, such as the Chimei Army, Shi Hu, Huang Chao, Wen Tao, Liu Zhenhua, these are with the army, and the number of tomb robbers alone is innumerable.
But the Mausoleum of The First Emperor of Qin is still unharmed, and its underground palace location has always been relatively confusing. The first modern expedition was in 1962, and according to the exploration of the mausoleum, the area should be 56.25 square kilometers, equivalent to 78 Forbidden City. According to the palace wall, even though Guanzhong experienced a major earthquake of magnitude 8 or above, the Mausoleum of The First Emperor of Qin was still intact. According to the "History of Qin Shi Huang Benji", "mercury is used as a hundred rivers and seas", that is to say, there will be a large amount of mercury in the underground palace.
Even if it is not based on the experts' tests, the pomegranate tree on the side of the mausoleum can be seen. Generally speaking, mercury cannot be absorbed, but after thousands of years of slow absorption, the pomegranate tree on the top can be detected. The first is that the growth is very slow, the height is average, and the fruit is highly toxic, so these pomegranates are forbidden to be picked. After the experts tested, the underground palace was indeed mercury abnormal, and it had to be said that the first emperor was the first emperor, and mercury was also the first person to be the river and lake.
There is also a lot of speculation about the treasures inside, after all, the Qin Terracotta Warriors unearthed in March 1974 alone is enough to shock the world. However, the Mausoleum of Qin Shi Huang has no intention of excavating so far. The main imperial tomb is too big, and the excavated treasures have no way to protect. There is also mercury, which has long formed poisonous gas, and if it is released, it will probably make the nearby people unable to live in peace. Not digging is the best protection for it, and the First Emperor, who has been sleeping for more than two thousand years, probably does not want others to disturb his peace.
Reference: "History of the First Emperor of Qin"