Live frogs or frogs are used as bait. When installing the fishhook, pierce the fishhook from the frog's back (above the anus) and hook it along the back to the tip of the frog's upper jaw (don't hook it to the spine, or it will kill the frog), so that its abdomen will protrude, and its back will bend at the hook bend, so that its two front legs will keep extending forward, and its two rear legs will be close together, and a thin black thread will be tied at the upper end of the hook handle.