The contents of the recognition certificate should include the following:

1. Certificate number and date of issuance

The recognition certificate should be marked with a unique certificate number and date of issuance for identity verification and time confirmation. For example, "certificate number: xxxx-xxxx-xxxx; Date of issuance: xx, xx, XX ".

2. Name of the certificate holder

The certificate of approval shall indicate the name of the certificate holder, such as "Zhang San" and "Li Si Company". If the certificate holder is not an individual, but an organization or institution, the name and official logo of the organization should be used.

3. Approved items or standards involved in the certificate

An approved certificate shall indicate the approved items or standards involved in the certificate, such as "Quality Management System Certification" and "Environmental Management System Certification". In addition, the specific number and version of the international standard or national standard that the certificate conforms to shall be stated.

4. Name and logo of the accreditation institution or organization

The accreditation certificate shall indicate the name and logo of the accreditation institution or organization, such as CNAS, ISO, etc. These signs and names will prove the authority and legitimacy of the certificate.

5. Validity period of the certificate

The recognized certificate shall indicate the validity period of the certificate, that is, the time period from the date of issuance to the end of the expiration date. Generally speaking, the validity period of a certificate is three years, five years or ten years.

6. Type and grade of certificate

The recognized certificate should indicate the type and grade of the certificate, such as "initial certification", "re-certification" and "standard grade: ISO 91：215". This information will prove the ability and qualification of the certificate holder.

7. Issuer or signature of the accreditation certificate

The accreditation certificate shall be stamped with the official seal of the accreditation institution or signed by the relevant person in charge to prove that the certificate is legal and valid. If the official seal is affixed, the name and number of the official seal shall be indicated on the certificate.

8. Other additional information

According to requirements, the accreditation certificate may also include other additional information, such as certification scope, certification standard, certification number, certification status, etc. This information will further enhance the credibility and authority of the certificate.