Why did the Qin Dynasty perish when it reached II? What is the reason for its r? Luo Siding, one of the counter-revolutionary spokesmen of the Gang of Four, solemnly declared: "Throughout the ages, many people have explored the question of why the Qin Dynasty perished with different political purposes and made various answers." This sermon happens to be the self-exposure of the Gang of Four. With the "political purpose" of usurping the party to seize power and establishing a fascist dynasty with Jiang Qing as the lucky emperor, the Gang of Four tried to insinuate history and learn lessons, made the past into the present, published black articles, and enthusiastically talked about the "historical lessons" of the demise of the Qin Dynasty, such as the class struggle in Qin and Han Dynasties, Zhao Gao's usurpation of power and the demise of the Qin Dynasty. The Gang of Four and its imperialist regime. The literati asserted that the "six Zhao Yu countries" were the restoration forces that overthrew the Qin Dynasty, and that "the counter-revolutionary coup launched by Zhao Gao was the most important direct cause of the demise of the Qin Dynasty". This answer is a complete lie and fallacy, and it is a distortion and tampering of the history of the Qin Dynasty. Now, we must abandon the heresy of the "Four Emperors", expose their evil "political aims" and restore the true colors of history. What are the main contradictions in the Qin Dynasty? Is the contradiction between the landlord class and the peasant class dominant, or is the contradiction between the residual forces of the landlord class and the slave class dominant? This is a matter of principle that must be clarified first when analyzing the reasons for the demise of the Qin Dynasty.