A certificate is usually a document that proves or proves that a person or institution has specific qualifications or abilities. Specifically, certificates can be used for many purposes, such as proving that someone has completed a specific training or course and has certain skills or knowledge; Prove that a person is qualified for a specific job; Or prove that an institution has a specific qualification or grade.
However, the specific purpose of a certificate will vary according to the specific situation. If you can provide more information about the certificate issued by Beijing Sand Painting Association, I may be able to give more specific suggestions.