Service Realm
The three realms of service: satisfy customers, surprise customers, and move customers.
The things promised to customers should be tracked and implemented, and done to the end.
For customers' unsatisfactory needs, we must do our best to achieve them. Even if it is not achieved, we can win the hearts of customers.
Customers who have complaints are the easiest to become long-term customers. From the customers who complain the most, they can get the most valuable opinions and suggestions.
The customer is always "right", is to give the "right" to the customer, to save the customer's face, and not to embarrass the customer.