1. wallpaper decoration: you can choose your favorite wallpaper, stickers or wall stickers as decoration to fill the gap in the wall.

2. Decorative painting: in the gap of the wall, choose a decorative painting you like to hang on it, which can increase the overall color and atmosphere of the room.

3. Decorative shelf: Install a shelf in the gap of the wall, which can put some storage boxes or books, and also beautify the wall.

4. Wall-mounted horizontal bar: If the space is spacious, consider installing some fitness equipment, such as wall-mounted horizontal bar. This can not only use the gap, but also exercise.

5. Decorative lights: Installing some decorative lights, such as floor lamps and chandeliers, in the gaps in the wall can increase the artistic sense of the whole space.

In a word, we can choose the appropriate method to deal with the cracks in the wall according to our own preferences and actual situation, so as to beautify the room, increase practicality and improve the quality of life.