Why do fishing lines need molecular lines and buses, and a line with different thicknesses?

Old-fashioned traditional fishing is a line. Later, based on Taiwan Province's fishing experience, we began to use space beans and separate lines.

In fact, every line is ok, but it is not as good as the bus. The lead pendant doesn't have to sink to the bottom. Fish live in different water layers, and the water layers they catch are different! As long as you keep the fishing line vertical in the water, that is, the signal is accurate, you can adjust the lead pendant any way you want! The sub-line is much shorter than the bus, about ten centimeters! If it is a hand pole in the sea or water, it should be used, and the sea pole can be used or not! It depends on whether you are fishing or drifting. As long as lead skin is added to the bottom of fishing, drifting is drifting with it. If you lose control, you can pick it up, seduce it and throw it again!