What is the significance of Qingdao city civilization poster?

In order to further advocate social civilization, recently, Qingdao released a series of public service advertisements on the concept of "you know, don't forget" civilization designed around the small details of civilization in life. Once launched, it won the unanimous praise of the citizens with its kind painting style and beautiful design, and this series of endorsement advertisements has also become the focus of attention. In fact, civilization is often reflected in the details, such as whispering in public places, changing lanes when driving, and saying "hello" when calling the waiter. These little details will make the city more civilized