"This voice" refers to the heroic slogan shouted by the five strong men when they jumped off the cliff: "Down with Japanese imperialism! Long live the China * * * production party! " It fully embodies the hatred of the five strong men towards Japanese imperialism and their love and loyalty to the party and the people. This kind of love-hate relationship is the source of strength for the five strong men who are brave, tenacious and not afraid of sacrifice, the soldiers of the Eighth Route Army and the New Fourth Army under the leadership of the Party, and the heroes and sons in the anti-Japanese base areas behind enemy lines. This sentence fully praised the determination of the people of China to carry out the war of resistance to the end and their heroic spirit of not being afraid of sacrifice.