Logistics function. It is a classic saying in ancient art of war that the soldiers and horses have not moved, and the grain and grass come first. Emphasize the importance of grain and grass supply in the war and the necessity of preparing troops and materials in advance for the victory of the war. A strong Mazhuang does not mean victory in the war, but means sufficient food, water, weapons and equipment, and a stable logistics supply chain. So it belongs to the function of managing logistics. The importance of grain and grass has always been emphasized in history, military affairs and management. This famous saying can also be extended to any work. Preparing in advance and ensuring supply are the key to success. In any future work, we should keep this famous saying in mind, fully realize the importance of grain and grass first, and lay a solid foundation for achieving the goal.