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How did the May 4 Movement break out? What is its historical significance?How was the 1st National Congress of the CPC convened? What's the significance of the congress?How to understand that the establishment of the CPC is not a sudden occurrence? What is the significance of its establishment? What are the key output and significance of the 2nd National Congress of the CPC?Why did the 3rd National Congress of the CPC decide to establish a revolutionary united front together with the Kuomintang led by Sun Yat-sen?How was the Whampoa Military Academy established, and what role did it play? How to correctly evaluate the 4th National Congress of the CPC? What is the May 30 Movement, and what is its historical significance? How to correctly evaluate the 5th National Congress of the CPC?What are the reasons for the failure of the Great Revolution, and what historical experience can be drawn from it?What are the three armed uprisings led by the CPC after the failure of the Great Revolution,