The historical background of "Red Rock" is: the War of Liberation is advancing with thunderous momentum, Chongqing, the last fortress of counter-revolution, is under full siege, and the Kuomintang reactionaries entrenched here are engaged in a desperate struggle , and the Communists who were imprisoned in the "China-US Cooperation Institute" concentration camp launched a desperate struggle between light and darkness before victory. In order to express this situation in which we are at an absolute advantage overall but at a temporary disadvantage locally, the author spreads his writing from Zhazi Cave and Bai Gongguan to the shocking prison struggles, urban underground party activities and student movements, as well as The three clues of the armed struggle in the countryside are intertwined into a whole, depicting the last scene of the revolutionaries' struggle with the enemy on the eve of the liberation of Chongqing. It reflects from an important aspect the struggle situation and the style of the times that led to the all-out victory of the liberation war.