Third exhibition hall, introduce the revolutionary activity of comrade Zhu De from joining the Communist Party in September 1922 to the establishment of New Chinese in October 1949. In September 1922, Zhu De met the European branch of the CPC responsible person Zhou Enlai in Germany, joined the Communist Party of China. From 1923 to 1925, Zhu De had studied at University of Gottingen and the Moscow military training class. In the summer of 1926, Zhu De returned home, devoted himself to the revolution, had engaged in revolutionary activities in Shanghai, Nanjing, Wuhan, Wanxian etc.. In August 1st, 1927, Zhu De co Zhou Enlai and other comrades organized and led the Nanchang uprising. In January1928, Zhu De and Chen Yi launched the Xiangnan uprising, established the Soviet regime in six counties. In April1928, Xiangnan uprising troops which was led by Zhu De met the Autumn Harvest Uprising army which was led by Mao Zedong in Pan city, composed of Fourth Red Army, Mao Zedong severed as the representative of party, Zhu De was appointed commander. In June1928, the army of Zhu De won the battle in Lungyuankou. In November1931, Soviet republic temporary central government was established in Ruijin, Zhu De was appointed commander of the red army. The Anti Japanese war was broken in 1937,the second cooperation between the KMT and the Chinese party came true. The Red Army was redesignated as the Eighth Route Army,Zhu De severed as general commander. In August 15th, 1945, Zhu De issued the order "command Okamura Neji to surrender", it declared that we got the victory in the Anti Japanese war. After the victory of Anti Japanese War, a three year war of liberation was begun, as the Chinese people's Liberation Army commander, Zhu De worked hard. On one side, he carried out the investigation and research, on the other side,he arranged the battles, with the victory of Liaoshen, Pingjin and Huaihai three big battles, in April 21st, 1949, Mao Zedong and Zhu De issued an order to enter the country, then a million strong army crossed the Yangtze River, in April 23rd,Nanjing was liberated, in 1949, the people's Liberation Army entered Peiping, in October 1st, founding ceremony was held.