In 1940, Zhang Tingshu recuperated due to illness and left the front-line command post. Before the founding of the People's Republic of China, Zhang Tingshu died of illness at the age of 45. Zhang Tingshu is a senior general in the Northeast Army, as the commander of the 112th Division, the main division of the Northeast Army, he is the highest position among the generals of the Northeast Army who defected to the revolution, but unfortunately because of liver disease, he was unable to command the army in the later period, and died of illness in 1949, which is regrettable. At the time of the Fifth Five-Year Plan, 25 generals from the Northeast Army were awarded the rank of general, including General Lu Zhengcao, Lieutenant General Wan Yi, Major General Xie Fang, Zhang Xuesi, Chen Ruiting, Jia Tao, Sha Ke, Feng Yongshun, Zhao Donghuan, Yu Quanshen, Zhao Chengjin, Gao Cunxin, Li Jue, Xu Ming, Song Xuefei, Jin Zhenzhong, Zhang Zhiyi, Yang Youshan, Zhang Jialuo, Luo Wen, Ji Tingxie, Guan Songtao, Guo Weicheng, Wang Zhenqian, and Jiang Chao. Lü Zhengcao was the highest-ranking of the generals of the Northeast Army who defected to the revolution except for Zhang Tingshu and Wan Yi. Before joining the revolution, Lü Zhengcao was the commander of the Northeast Army, and because he was dissatisfied with the reactionary policies of Lao Chiang, he actively liaised with the party organization and secretly joined the party. Lao Jiang was alerted to this, and sent spies to monitor Lü Zhengcao, and attempted to divide and disintegrate Lü Zhengcao's troops. 
Lu Zhengcao immediately responded, and he directly led a whole regiment to join the Eighth Route Army and officially became a member of the people's army. You must know that at that time, the Anti-Japanese War had just broken out, and the entire strength of the Eighth Route Army was only 14 regiments. The addition of a regiment led by Lu Zhengcao to the reorganization of the people's army has undoubtedly made a very great contribution to the development and growth of the people's army. Lu Zhengcao served as the commander of the Jizhong Military Region during the War of Resistance Against Japanese Aggression, and also served as the deputy commander of the Northeast Democratic Alliance Army during the War of Liberation, and was a senior general in the people's army. Wan Yi was a brigade commander of the Northeast Army, and in the War of Resistance Against Japan, he led his troops to fight in the south and north, and made outstanding contributions to the victory of the Chinese people's War of Resistance against Japan. However, Wan Yi was also extremely dissatisfied with Lao Chiang's reactionary policies, and secretly joined the party as early as the early days of the Anti-Japanese War. Later, the reactionaries became aware of Wan Yi, and in 1940, the diehard Sun Huancai arrested Wan Yi and threw him into prison. 
In 1942, Wan Yi successfully escaped from prison after hardships and entered the Shandong Military Region, serving as the head of the Bohai Detachment and the deputy commander of the Binhai Naval District, becoming a senior general in the people's army. During the War of Liberation, Wan Yi, together with Lu Zhengcao and Zhang Xuesi, was sent to the Northeast organizationally, and served as the first deputy commander of the Jilin Military Region and the commander of the Northern Liaoning Military Region, making outstanding contributions to the liberation of the Northeast by the people's army. In 1955, Wan Yi was awarded the rank of lieutenant general. Among the 23 generals of the Northeast Army who were awarded the rank of major general, Xie Fang and Zhang Xuesi were the most well-known among them. Xie Fang served as the chief of staff of the Corps of Siye and the chief of staff of the Volunteer Army, and he was thoughtful, resourceful and decisive, and had extremely high military literacy, and was a Zhuge Liang-style figure in Siye. In the process of the people's army liberating the northeast and then participating in the liberation of the whole of China, the solution made suggestions, formulated operational plans, and provided operational plans, and completed them in an orderly manner, becoming a representative figure of the wise generals in the people's army. In 1955, Xie Fang was awarded the rank of Major General. As a quasi-corps-level cadre in the 1952 grade evaluation, and also served as the chief of staff of the Volunteer Army, Xie Fang was only awarded a major general, which was obviously too low. But because he joined the revolution late and has less seniority in the army, it is actually understandable. Zhang Xuesi is the son of Zhang Zuolin, the king of Northeast China, and the younger brother of the young marshal Zhang Xueliang. After the Xi'an Incident, the young marshal was imprisoned by Lao Jiang, and Zhang Xuesi was also arrested by the reactionary authorities. After his release after all the hardships, in the process of rescuing his brother, he began to become completely disillusioned with the reactionary authorities and gradually leaned towards revolution. 