Marshal Lin Biao created a little two sides, four quick and one slow, four groups and one team and other tactics. Lin Biao always pays attention to tactics and is good at studying tactics. His main characteristics are: first, he is good at popularizing and visualizing tactical thoughts and actions, and turning them into languages familiar to grass-roots officers and soldiers to master, understand and use. This is indeed targeted and effective for the quality of our army. In the past, our army was dominated by farmers, and the general education level of officers and men was low. Second, he attaches great importance to tactical education. Lin Biao often said that commanders should have a "mother-in-law's mouth" when talking about tactics, and they should constantly study tactics, sum up tactics and improve them. Lin is more practical. Every battle, Lin always takes tactical summary as a special topic, personally investigates and studies, personally summarizes and writes, and personally teaches by example. Commanders and combatants at all levels of the whole army are also required to summarize at all levels. Lin often said that you are not afraid of losing a battle, but you must understand the defeat and see the win clearly. Never take improving and studying tactics as the superior's business. Everyone should strive to be a tactician. Third, he attached great importance to the dialectical relationship between tactics and casualties. Lin often said that improving tactics is to reduce casualties and speed up victory, and it is a real concern and love for soldiers. If the troops wiped out 10,000 enemy troops and lost 8,000, the battle would not be worth the loss, that is, the tactics were not done well. Although they won, it is not worth celebrating. Therefore, the troops in the four fields have always been famous for their great exploits and small casualties.