Lunarvim lspsaga shows chinese characters

I’ve downloaded lunarvim and installed an lsp.

It works, but some things really confuses me.
What’s that red chinese character on the left?

And why do I have a blue chinese character 7?
Is this some kind of git thing?

it’s most probably a font issue. try using a font which supports nerd fonts. I personally use
Jetbrains Mono Nerd Font but a full list is available here