Introduction to the third exhibition hall: The third part, the Anti-Japanese War Behind Enemy Lines, mainly introduces the New Fourth Army's advance to the north and south of the Yangtze River, opening up and consolidating the battlefield behind enemy lines in Central China, and creating and developing the development and growth of the Anti-Japanese Base Area in Central China, laying the foundation for China's Anti-Japanese War and the World Anti-Fascist War. Immortal feats of victory.