The main reason is: 1. The national army is insufficient. If it can exceed 200,000, it will not stop attacking Jilin and Harbin after occupying Changchun. 2. The Soviet Union intervened. The Soviet Union handed over a large number of weapons and equipment seized by the Kwantung Army to the four fields, but due to different systems, the Soviet Union did not use them. After the national army occupied Changchun, it stopped attacking Jilin and Harbin, and there were also factors that were afraid of Soviet intervention. 3. Incorrect acceptance policy, refusing to accept and resettle 40 Manchukuo puppet troops. As a result, it was accepted by the four fields and its military strength increased greatly. 4. The Soviet Union assisted in the establishment of arsenals in Hunchun and Dalian (occupied by the Soviet Union at that time), and used warships to protect the arms transportation line from Dalian to North Korea and then to Shandong. Anyone with military common sense will know that weapons and equipment can be seized, but ammunition cannot be seized. Otherwise, how can we resist Japan, US aggression and aid Korea? Of course, the Soviet Union's support was not unconditional, at the cost of Mongolia. 5, land reform policy: will fool politics than who is better at deceiving people, who is more vicious! After the peasants participated in the partnership robbery at the expense of blood and tears, the real estate such as land acquired was forcibly "cooperatively" recovered ten years later! The government of the Republic of China did not have time to implement the land reform policy until Taiwan Province Province. First, use Lord M to fool the intelligentsia. Once the regime is stable, once again, we will fight against the five evils Rightists and settle accounts after the fall. The people who can really see through its essence are Hu Shi, Mei Yiqi and Qian Mu. It is this theory that has been perfected in the Nordic countries, forming the most just and honest country in the world today (all claiming to be social Z-meaning). People in developed countries know very well that if there is no procedural legitimacy, they have no real political rights. What I gave you today may be taken away tomorrow! The most important thing is the first four in the initial stage. At the beginning, the northeast military and civilians really welcomed the national army! Land reform came later. Daxing Military Industry: These are the secrets of the PLA's surge in combat effectiveness in the War of Liberation. There should be high school history, hehe.