Mullet, a specialty of Jinping, is named after its black body. Hunan is called Cai Yu, and other places are called octopus, snakeskin fish, seven-star fish, black stick and so on. It has strong teeth and specializes in eating all kinds of small fish and shrimp, so it is known as the "freshwater fish tyrant". However, it is lazy and unwilling to rush around to fill its stomach. It only eats 60 to 70 percent at a time. Because the activity is small and the consumption is low, the vitality is particularly tenacious. It is said that it is not a problem to sleep in the mud for two or three years, so there is a saying among the people that "Tuantang mullet has patience". Snakehead can generally live for 30-40 years, and the longest can live for nearly a hundred years, which is considered as the longevity of freshwater fish.

Cuttlefish is sweet and cold in nature, and has the effects of invigorating spleen and benefiting qi, diuresis and detumescence. For lying-in women and patients who have undergone surgery, using more than 500g mullet 1 piece, scraping scales, removing fins and intestines, adding a little water and salt, and stewing in soup can promote the healing of uterus and wounds, expel silt and regenerate. People who are weak after illness often eat mullet stew, which has the effects of nourishing the heart, eliminating dampness and reducing swelling. In addition, when there is no milk or a small amount of milk after delivery, use more than 500g of mullet 1 piece, add water, yellow wine, salt, monosodium glutamate and stew after frying. When soup is as white as milk, even soup can be eaten. Its prolactin effect is far better than crucian carp soup and chicken soup.