I would like to ask a question and hope to receive the help of the big shot. What is the solution to the problem of displaying garbled characters in Chinese when setting comments on Winbox on webfig

No useful information. What hardware? What software version? What WinBox version? Screen capture of what you're talking about.
And this should have been in the "Beginner Basics" section of the forum. Maybe a moderator can move it.

Edit - Thanks to whichever moderator moved this to the Beginner Basics section of the forum...

What is the solution to the problem of displaying garbled characters in Chinese when setting comments on Winbox on webfig

Simply: Do not use logograms but only transliteration with 7-bit latin characters.

RouterOS do not support at all UTF-8.

感谢各位大神的解答