How to tie the fishing secondary line to the main line?

Fishing with a pole is generally a single hook, and there are also double hooks. The thread used to tie the hook is called the brain thread, which is also the auxiliary thread. The distance from the hook handle to the lead pendant is called the brain line length. Those hooked with nylon thread are called hard brain thread, and those hooked with nylon thread are called soft brain thread. Hard brain line is sensitive and suitable for fishing small fish. The soft brain line is easy to bend and has strong expansibility, which is suitable for catching big fish. There are many ways to hook the brain thread, mainly by fastening the hook firmly, using scissors and small pliers when knotting, and avoiding knotting with hands and teeth. The length of the brain line depends on the size of the fish. The fish brain line should be kept long, and when the hook is tied with soft brain line, it should be shorter than hard brain line. The brain line is too long, and the fish has poor sensitivity when eating bait; The brain line is too short, and the lead pendant will touch the fish's mouth when the fish eats, which is easy to decouple.