The key to the demise of the Qin Dynasty is Qin Shihuang. It is not that Qin Shihuang wasted people's money by repairing the Great Wall, the Mausoleum and the Epang Palace, but that Qin Shihuang thought too highly of himself and pursued immortality. In the end, Qin Shihuang never deliberately prepared or trained successors, and never prepared a set of backup leaders. You know what he wants is immortality, and no one needs to take over. As a result, once he died suddenly, there was a huge power vacuum in the ruling structure of the Qin Dynasty. This just gave Zhao Gao these people the opportunity to practise fraud. If it was before, it would be clear that the prince had his own team and the son of heaven was patrolling and supervising the country. Where will this happen?