Cats are very good at entertaining themselves. Without their owners, they can find fun at home by themselves, such as tearing things up. So the best way to solve this problem is to provide them with more interesting toys, such as hanging cat wands and small bells, to divert their attention from tearing paper. 
When cats experience significant psychological stress, they may exhibit paper-tearing behavior, similar to humans throwing pillows at each other as a form of stress relief. While this may provide some relief, prolonged exposure can exacerbate a cat's violent tendencies.
Therefore, owners need to identify the source of their cat's stress, such as a certain smell in the environment or the attitude of a family member towards it. Try to resolve these issues and provide them with a comfortable living environment.
Some cats tear up paper to eat it, which may be because your cat is lacking a certain nutrient, causing pica.
This means you should pay attention to whether the cat food you are feeding your pet is suitable for its age and nutritional needs. If you are really unsure, you can take your pet to the vet for a simple physical examination and ask the vet to recommend food based on the actual situation.
Many of a pet's bad behaviors are instinctive, but they can be improved through guidance and training in daily life. When these problems occur, don't rush to blame them, but think about what you might have done wrong.
