Simple sweet potato flour is not very effective and has almost no effect. I have actually used it. It is recommended to use the sweet potato flavor of commercial bait, such as Huashi’s sweet potato carp, which is good in both condition and flavor. It can be paired with pure Grain, at the same time, add some Snail Carp No. 2, and some snowflake powder to improve the bait condition. It is best to combine it with some Marukyu's wild food, Wushuang, three-color carp and the like. In the black pit, the bait alone will not be effective. Add some additives and small medicines to the bait to increase the fish luring effect. It is recommended that you try Yipinyuan's Heikengweiwu and Wangzheluo, two small medicines, and add them to the bait to attract fish. The effect is good. If you want to fish well, you must be diligent. , remember to throw the pole frequently and repair the nest frequently. I hope it will be helpful to you