The training contents mainly include: fighting principles, organization and command, fighting formation, fighting methods, sports methods, strengthening the use of weapons and firepower, and coordinated actions among teams. Usually around the attack, defense and serve system, interspersed with a small number of technical classes, staged operations, coherent operations, comprehensive drills. The tactical training of detachment adheres to the principle of bottom-up synthesis step by step, focusing on cooperative basic training and aiming at improving the overall combat capability of detachment. Tactical topics can be divided into compulsory training and selective training. Mandatory training topics must be completed within the training time specified this year. Training topics are generally decided by the training department at or above the division level every year according to the specific situation and training level of each unit. In addition, each unit can also choose other training contents according to combat tasks, weather conditions and terrain characteristics.