How do fishing line painters take good photos?

A fishing line is a line hung on a fishing rod when fishing. Similar to the silk spit out by spiders, it is thin but strong. Fishing line is a kind of line commonly used in life. Fishing line is not only used for fishing, but also for tying things in our life.

Trigonometry is that the photographer divides the scene with two vertical lines and two horizontal lines, just like writing China tic-tac-toe. In this way, you can get four intersections, and then you can focus on one of the four intersections.