The fox has a smelly gland under its tail. When it is chased by hounds and other wild animals, it will emit a "foul smell" that makes people want to vomit. Under the attack of fox odor, the enemy loses the direction of pursuit. The fox will also hide under the water, making the hound's sense of smell fail and unable to catch it. What's more, when the hunter caught the fox, it still had the ability of "feigning death". For a while, it was like dying and being at the mercy of others, but when people were unprepared, it suddenly turned over and jumped away. This shows how cunning the fox's ability to escape from the enemy is.