What's the use of Lua's former command?

Luya is a fishing tool, which is used by many people in China. And Luya has a former conductor. Let's talk to you about the specific role of Luari's pre-command. The function of Luya front conductor: to protect the main line on Luya and avoid damage due to excessive temperature; Can prolong the service life of the main line; It is difficult for fish to find the existence of the main line; Reduce the tension after the fish bites the hook; I can throw it further when I throw it to Luya. Of course, the most important role is to ensure the safety of our lives. If there is no front lead, it may break when pulling fish, which will do great harm to people.