Here are some possible suggestions:
1. Hanging abstract painting: Abstract painting can add some artistic flavor and can be matched with any style. You can choose some paintings with soft colors and simple lines, such as black and white photos or pastels.
2. Hanging the natural landscape: The natural landscape can make you feel as if you are in nature, bringing a sense of tranquility and relaxation. Such as landscape painting or plant painting.
3. Hang figure painting: If you like figure painting, you can choose some artists you admire or your own photos.
4. Hang maps: If you like to travel or explore the world, you can choose some world maps or city maps.
5. Hang black and white photos: If you like retro style, you can choose some black and white photos, such as photos of old Shanghai or European cities.
In short, the most important thing to choose what pictures or photos to hang is to conform to your overall style and preferences. At the same time, we should avoid overcrowding or imbalance and maintain overall harmony and beauty.