1, cppm (registered professional procurement manager) certificate is a professional qualification certificate related to procurement. These certificates can prove that the holder has certain purchasing professional knowledge and skills, which is helpful to improve his career development and get better career opportunities.

2. The buyer's certificate is the entry certificate to enter the procurement industry. The holder usually has a certain basic knowledge of procurement and understands the procurement process and operating specifications. Certificates are generally issued by trade associations or training institutions, which have certain recognition and guiding significance for new procurement personnel.

3. Assistant procurement certificate and procurement certificate are higher-level professional qualification certificates, and the holders usually have more professional procurement knowledge and skills and can be competent for more complicated procurement tasks and management responsibilities. These certificates usually require the holders to have certain professional experience and pass relevant examinations or assessments.