Pretend to be a good fisherman.

Let's rule out the fish nest first. When a small fish bites, the buoy moves up and down quickly and with great amplitude. When the crucian carp is hooked, most of them slowly climb to the top, and when they reach two or three eyes, they can lift the pole. When carp bite people, most of them are black marks, and the speed of sinking is generally not fast. At this time, you can lift the pole, no matter how fast it floats or sinks.