In order to change the traditional training model, the East China Theater formed the first professional blue army unit in the army-the Mountain Leopard Brigade. The Mountain Leopard Brigade first appeared and confronted the 808th and 909th divisions of the ace divisions. The Blue Army made an unexpected and abnormal attack, which embarrassed the two traditional ace armies and caused an uproar in the army. At the same time, its "extraordinary performance" attracted a lot of criticism. The Blue Army, under various discussions and pressures, continuously improved its team building and played its reputation in cross-military exercises. The following year, the Red and Blue Armies faced off again. After more than a year of tempering and tempering, the 808th Division faced off with a brand new look, and finally lived up to expectations and won a complete victory, which fully proved the efforts and achievements of the Blue Army over the past year. After continuous difficult exploration and construction, the Blue Army, as a brand-new branch of the army, was finally established in the sequence of the People's Liberation Army and recognized by the majority of officers and soldiers.