4 star

The Chinese apparently like feedback. When we got our passports checked in immigration to China, the agent was working below a huge sign that exorts him to enforce every law and reminds him he serves the passenger. There is an electronic push button with four choices: very satisfied, satisfied, unsatisfied and very unsatisfied. I pushed very satisfied.
At the bank, the teller had the same system. She also had electronic stars. She was a one-star teller but her neighbor had three stars. I pushed very satisfied and she beamed.
There are many public toilets throughout Beijing. Some are very dirty. Others are “Four Star.” They are clean, well-serviced and pleasant. Employees in white lab coats service them.