How to choose the type of fishing line when fishing?

If you go fishing in Taiwan Province, you can use the Guidori method:

Carassius auratus: major line: 1 line, minor line: 0.4-0.8.

Carp: major line: 1-2.5, minor line: 1-2.

Grass carp etc. : Big line: No.2.5 or above; Subline: bottomless hanging; Direct powered horse; Bottom scraping: less than 1.

Wild fishing: I use a size 3.5 or larger. The secondary line is generally a strong horse or fishing line above 2.5.

If you use a rock pole, use line 2, and the sub-line is smaller. There are wheels on the rock pole to skate fish.