Sun Yat-sen led the revolution and once quoted this famous saying. The vast historical trend is understood as the inevitable trend of historical development, regardless of the will of the rulers. According to the reality at that time, it meant that the autocratic monarchy (imperial system) in Qing dynasty could not adapt to the pace of the times, which seriously hindered the development of the country. All power has entered the constitutional monarchy or the parliamentary system or the presidential system of universal suffrage. The enlightenment thought has not yet started, and the government should actively improve it. If the government refuses to improve it, it will trigger the revolution of democratic fighters. This is inevitable.

Sun Yat-sen quoted this famous saying to declare the rationality of revolution and its universality in human history.