In any war, the three roles of commander, political commissar and chief of staff will affect the performance of the troops on the battlefield to a certain extent, and whether they cooperate closely or not may directly determine whether the troops can win the war.
During the war of liberation, there appeared the trinity of division, politics and staff with the most efficient command and perfect coordination. They are Lin Biao, commander of the Northeast Field Army, Luo Ronghuan, political commissar, and Liu Yalou, chief of staff.
In order to ensure the concealment of the orders issued by the authorities, "Lin Luoliu" was given codes such as "10 1", "102" and "103" in the military.