1, junior staff: This kind of staff is usually new. They may have just graduated from school or have less work experience. They usually need to receive some basic training in order to better understand the company's business and operational processes.
2. Intermediate employees: These employees are usually employees who have worked in the company for a period of time. They have accumulated some work experience and can handle some tasks independently. They may play a leading role in some fields or projects.
3. Senior employees: These employees are usually the core employees of the company. They have rich experience and advanced skills and can hold important positions in the company. They may lead the team, make strategic plans and make important contributions to the development of the company.