Telecom supplier code refers to the unique identification code obtained by telecom equipment, materials, services and other suppliers from telecom operators. Telecom operators need to examine and approve supplier codes to ensure that suppliers' qualifications and products meet the relevant standards and requirements of the telecommunications industry. The approval process of telecom supplier code usually includes application, preliminary examination, review and issuance. Specifically, the supplier needs to submit an application to the telecom operator, review it after it passes the preliminary examination, and issue the code after it passes the final examination. In the process of examination and approval, telecom operators will review the qualifications, product quality and service capabilities of suppliers to ensure the legitimacy and reliability of suppliers.