Before that, I couldn't make it clear what some of the symbols used in the second were.

In square brackets [], it is the inner activity of the character.

In parentheses (), there is a voiceover, which is usually a supplement to the information.

In double quotation marks "", it is a dialogue.

In single quotation marks, there are some nouns.

I didn't make it clear until now, so I'm sorry that everyone was confused when they saw it.