It’s called the “termination line”.

There are two types:

1. Both are thin lines, indicating the end of the section;

2. The front is a thin line and the back is a thick line. , indicating the end of the music (or movement).

A slightly thicker double vertical line written on the right side of the end of the music is called the termination line, such as: "∣▕　".

The end of the section: two adjacent vertical lines, equally thin.

The end of the music: two adjacent vertical lines, the left one is thin, the right one is thick

The ballad of the end line: two sisters are the same length, one is thinner and the other is fatter, She was at the back of the queue, and after the song was sung, she made an appearance.

Extended information:

The bold vertical line at the end is called the "terminating vertical line", which means the end of the song.

End of the section: two adjacent vertical lines, equally thin.

The end of the music: two adjacent vertical lines, thin on the left and thick on the right

This method of expression is to use two vertical lines, one of which is thin, A thick line runs in parallel, with a thin one in front and a thick one behind. This is called the "terminal line", indicating the end of the music. (The upper and lower ends of the termination line are also not allowed to go out and must be aligned with the first and fifth lines).