Et al. mainly analyzed it from the

Et al. mainly analyzed it from the perspective of cooperation with suppliers. They believe that cooperation between suppliers and manufacturers will directly affect the purchase price. Usually, the supplier will not voluntarily reduce the price of the product, unless there is a quality problem. From the perspective of the manufacturer, the most basic requirement for the procurement business is to buy the best quality products or services at a lower price. Therefore, from the perspective of both parties, only by establishing a long-term and stable cooperative relationship can both parties get the maximum benefits in the process of cooperation and reach a win-win situation. As for the manufacturer, it can change its passive position and take certain initiative in bargaining, so as to achieve the goal of controlling the purchase cost