The back-end system is mainly divided into several types: managing people, managing affairs, and managing things.

There are two types of systems managing people, internal and external. External systems include CRM (customer service management system) and internal attendance systems;

Managing affairs, in short, is what people can do and how they can do things. The most classic ones are the data statistics backend and the business flow management backend; Manage things mainly refers to the E-commerce management backend, which is used to manage commodity transactions.

However, in essence, the backend mainly includes three aspects: authority management, workflow, and record flow. It can be boiled down to one sentence, who can do what and what records need to be generated: who-where-how-what for short