What is the buyer-supplier relationship? How do you maintain old supplier relationships? How to manage suppliers? How to establish a good supplier management system?

The relationship between the buyer and the supplier is a mutual customer relationship, both sides should try to meet each other's reasonable needs, as for the maintenance of the old supplier that depends on the results of the organization's supply-side evaluation, is not a high-quality supplier, if it is, it should be like the maintenance of the old customer as the maintenance of supplier relations; as for the establishment of a supplier management system, you can refer to the unit of customer management system for management.