On November 1, 1948, the Central Military Commission of the Communist Party of China issued a decree issued on November 1, 1948, the Central Military Commission of the Communist Party of China issued an order issued by the Central Military Commission of the Communist Party of China on November 1, 1948, to change the field forces into the field forces. The fields were divided into the Northwest, Middle East, East China, North East China and the North China Field Army. On January 15, 1949, the North West Field Army was changed to the First Field Army, the Middle Field Army to the Second Field Army, the East China Field Army to the Third Field Army, the East Northern Field Army to the Fourth Field Army; the three divisions of the Chinese Northern Field Army directly belonged to the headquarters of the Chinese People's Liberation Army