1. Customers' suggestions and complaints must be registered one by one and dealt with carefully. Reply to customers in a short time. If the customer is not satisfied, continue to take measures or report to the superior until the customer is satisfied. And the complainants are criticized and educated, and serious cases are punished and ordered to apologize to customers.

2. Regularly return to customers, humbly accept customers' opinions and suggestions, as the basis for improving work, and constantly improve service quality.

3. Every service staff must adhere to the principles when performing after-sales tasks, and be willing to accept the supervision of customers.

4. The after-sales service personnel respond to the urgent needs of customers, complete the service tasks with high quality in strict accordance with the requirements of customers, seriously answer the questions raised by customers, and actively provide various solutions for customers to choose from, so as to achieve customer satisfaction.