1. The local agent's technicians need to verify on site, and after confirming that it is a hardware failure, ask the customer to fill out the Customer Replacement Application Form (in duplicate) and retrieve the failed key disk, and keep a copy of the Customer Replacement Application Form for the customer.

2. Service station personnel need to go to the public security department to scrap the damaged key disk.

3. The staff of the local service station brought the failure key disk back to Liaoning Yin Wei Company for return and exchange.

4. After the key disk exchange is completed, the staff of the local service station will hand it over to the seal factory for re-association operation, and then when the re-associated key disk is handed over to the customer, the application form in the customer's hand needs to be recovered, and the service will be closed.