The Chinese Communist Party, in order to seize Yuan and destroy the Party's, political and military command center, gathered more than 300,000 troops in the northwestern region on March 13, 1947 (February 21, 1947) and began the Yuan Defense War. The Chinese Communist Party, in accordance with the opponent's position, decided: "First temporarily abandon Yuan, in the northern mountains of Yuan, to create combat aircraft, and gradually destroy the life forces of the Party's, political and military command center. On March 13, 1947, the Southern Front of the National Party began to launch an offensive from Yuan and Lohan on the two roads to Yuan Defense. The Chinese Communist Party, in accordance with the opponent's position, organized the defense movement, slowed down,