The line group is usually 3+2 or thicker lines for fishing. Float adjustment usually means adjusting the float until the entire floating mesh is exposed to the water, hanging bait to catch one or two meshes, fishing for silver carp off the bottom, and fishing for silver carp. Bighead carp bait is mainly commercial bait.

Bighead carp (scientific name: Aristichthysnobilis) is also called silver carp, fat-headed fish, baotou fish, big-headed fish, black silver carp, hemp carp, and also called male fish. It is a type of freshwater fish. Known as the "scavenger in the water", it is one of the four major fish species in China. It looks like a silver carp, with a flat side body. The head is larger and wider, and the mouth is also very wide and slightly upturned. The eye position is relatively low. Bighead carp grows in freshwater lakes, rivers, reservoirs, and ponds. Mostly distributed in the middle and upper layers of waters. It is a fish unique to China. It is widely distributed in China. It is one of the main objects for pond culture and reservoir fishery, and has high economic value. It is edible and has the effects on the human body of improving IQ, enhancing memory, supplementing nutrition, and delaying aging.