What is the photographic movement line?

It is a line that enhances the movement of the picture.

Generally, the moving things in the picture form a line, which can make the picture dynamic.

Lines are everywhere, and every object has its own distinct line characteristics. Geometrically, a line is defined as a trajectory formed by a point moving in any direction. In photography, lines are not only the basic means to express objects, but also the main method to convey the beauty of images. Being good at discovering and refining lines in objects helps to produce different picture effects and deepen the theme.