Ask the fishing expert to help analyze the reason.

Sea pole: use chaff cakes, square and round, and remember to use board hooks. If it doesn't work, mash it with bran cake, add sesame oil and flour, and use a hook.

Hand pole: Try the earthworm. Don't use the one near the reservoir. Go further. Use those red, tender and black ones. Of course, it is also good to throw earthworms with bigger double hooks at the sea pole.