How should I write this banner slogan? For bank clerks...

Write like this: "This is what you should do"

Haha

This is really what bank employees should do. You are so polite. Write a letter of praise or type. Calling their municipal branch to give the employee's name is often more effective in banks and saves you the trouble of making a speech

If you must send it: When someone is in a hurry, it's better to pick up the gold