British short blue cats cannot ward off evil spirits. American shorthair, blue cats, and pastoral black cats. All these cats are black and can ward off evil spirits. Cats themselves are psychic messengers. Black cats have stronger perception than ordinary cats, among which black cats are the strongest. Cats have a very special ability. They can see ghosts, communicate with ghosts, and control most wandering ghosts with low cultivation levels. As for why cats have this ability, there have been two schools of thought since ancient times: The first school believes that cats are little tigers, and tigers are creatures with strong evil spirits. Evil spirits can suppress ghosts very well. Although cats do not have as powerful evil spirits as tigers, they can control them. Ordinary ghosts are enough. The second school believes that cats themselves have special spiritual power. This spiritual power includes the ability to suppress and confuse. Through this ability, cats can reliably control ghosts. No matter which view is more accurate, one undeniable fact is that cats can control ghosts. This answer is for reference only, please do not be blindly superstitious.