The words on the wall refer to some unauthorized or unauthorized words, patterns or signs on the walls of buildings or other public places. This phenomenon is very common in cities, especially in some communities, public places and downtown commercial streets.

There are many reasons for the words on the wall, including:

1. Express emotions. Some people will paint their emotional thoughts on the wall, such as some political slogans or emotional declarations, to express their views.

Sign your name as a souvenir. Some people will leave their names or marks on the walls as a souvenir or to show off.

3. Express your approval for someone or something. Some people will express their support or recognition for someone or something on the wall, such as some singers and movie stars.

4. sabotage. Some young people or saboteurs will do destructive graffiti on the wall to achieve the effect of destruction and record-breaking.

5. Express culture and art. Some art lovers express their cultural and artistic views and creative imagination by doodling or painting on the wall.

The phenomenon of existing characters on the wall will have a certain impact on the urban environment, destroy the beauty and cleanliness of public places, and also cause public safety problems. In order to solve this problem, the government and social organizations should strengthen urban management, clean up illegal phenomena in time, strengthen urban planning and management, and make the city more beautiful, tidy and orderly. At the same time, we should encourage some beneficial cultural and artistic expressions, support creative graffiti and wall painting, and promote the prosperity and development of urban cultural and artistic atmosphere.