It is said that there is a coffin in the mausoleum of Qin Shihuang in Xi 'an. Who is in the coffin? Is it Qin Shihuang? If not Qin Shihuang, where is the real Qin Shihuang?

1: The coffin is in the underground palace. "Historical Records" records: "Wear three springs, bury bronze, the palace is full of officials, and strange things are moved to Tibet. Take mercury as a hundred rivers and seas, and instill it by machine. There is astronomy above, geography below, and mermaid cream is a candle. If the degree is immortal, it will last a long time. " The first emperor thought that his empire could last for thousands of generations, all of which were in the Qin tombs. According to Records of Historical Records of Qin Shihuang, the underground palace "takes mercury as a hundred rivers". Through geophysical exploration, it is confirmed that there are obvious mercury anomalies in the underground palace, and the mercury distribution is strong in the southeast and southwest, but weak in the northeast and northwest. If the distribution of mercury represents rivers and oceans, it coincides with the distribution of Bohai Sea and Yellow Sea in China. "Qin Shihuang has been to Bohai Bay personally, so it is likely to sketch the Bohai Sea into his underground palace. If this is confirmed, it shows that the Qin Dynasty conducted an investigation and study on the geography of China, which is also a new discovery. " Qin Shihuang used mercury for rivers and seas, not only to create a magnificent natural landscape, but also to make the buried bodies and funerary objects not rot for a long time because of the mercury gas in the underground palace. Moreover, mercury is a highly toxic substance, and a large amount of inhalation will lead to death, so mercury in the underground palace can also poison grave robbers.

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