In addition to the first pit discovered by the farmers, two more pits were found nearby, containing altogether around 8,000 life-size warriors and horse s. These had been buried 5-7 meters underground, and archaeological studies have confirmed that there was at one point a wooden ceiling of about 3.5 meters high covering the warriors. Archaeologists believe that the subterranean structure was constructed by first digging a pit about five meters deep, which was then divided into sections by rammed-earth partitions. The builders then placed the beams of the wooden roof on top of these partitions, and covered the entire structure with a layer of earth 2.7 to 3 meters deep.
When the warriors were excavated, almost all the pottery figures were broken and the wooden ceiling had been burned. Carbon dating methods indicate that the ceiling was burned 2200 years ago, very soon after the death of Qin Shihuangdi. Sima Qian's Shi ji, one of China's oldest historical records, indicates that the Qin Emperor's palace and mausoleum were destroyed in the rebellions that surged just four years after the Qin Shihuangdi died, in 206 BC. As a result, most archaeologists believe that the reason why the warriors were found crushed beneath an incinerated wooden ceiling is because the rebels opened the underground complex in order to get at the weapons, and then set it ablaze.
However, there are some problems with this explanation. First, scans of the Emperor's tomb, which has not yet been excavated, indicate that it has never been opened, contrary to the Sima Qian's assertion that it was burned by the rebels. Furthermore, had the rebels actually penetrated the terracotta army complex to the east of the tomb, as they would have needed to do in order to burn the entire structure, in all likelihood they would have looted the bronze weapons buried with the figures. As over 40,000 bronze weapons have been unearthed in pits one and three, with possibly more still buried in p it two, this clearly did not happen.
There are also practical physical reasons why the present theory is untenable, making it urgently necessary to re-evaluate the current explanation for the state in which the warriors were found. The air 3.5 meters underground would not have been rich enough in oxygen to support a fire capable of destroying the entire ceiling. Also, the wood, after having been buried for many years, would have been wet or even rotten. It would have been difficult to burn under the best of conditions, but interred in a vast underground complex with little or no ventilation, it would have been next to impossible produce a fire destructive enough to cause the structure to collapse.
Overwhelming evidence suggests that the terracotta figures buried for the First Emperor's use could not, in fact, have been destroyed by the rebels intent on overthrowing the Qin dynasty. I would like to propose an alternate theory, which I believe conforms both to China's ancient and traditional religious practices as well as to the physical evidence unearthed by archaeologists.
In China, the oldest religious tradition, dating back even before the time of the First Emperor, is Daoism. According to the Daoists, the only way to send objects to the dead is by burning them as a sacrifice. This tradition persists even today, as people continue to burn paper money, horses, cars, etc., as offerings to their loved ones who have passed away. The layout of the underground complex, including its location and organization, suggests that the Emperor was convinced of the importance of feng shui, or geomancy, and used Daoist concepts in the construction of his underground realm. It is logical to conclude, then, that he would have want ed to ensure that he would have access to this upon his death, causing him to leave instructions that the complex be burned as a sacrifice to him after he died. I believe that the underground city containing the terracotta figures was constructed from the start with the intent to burn their contents, thus ensuring that they would reach the emperor in the spirit world.
