Just like the picture show.

@oldjunyi

It.. it doesn't LOOK small?
Can't you just turn up your GUI size?

How would I deal with this anyways? I mean, it's fine with the normal font.

It's full screen. (screen size: 1366×768)
And it seems that occur only in Chinese.

Um, I remember you @oldjunyi use language file to control scale ratio in OpenBlocks? Could that also apply here?

Oh, that's actually a good idea. I'll just do that.

Ref: OpenMods/OpenBlocks#655

@TartaricAcid So you just need to update the zh_CN.lang now... Long missing update since BTM 16.2.

yes, you are right.
But I be busy for my final. I will update the zh_CN file in January.

^ me irl

Minecraft does not have anti-aliasing font rendering method. Using non-integer GL scale ratio will break the font. A line with 0.9 pixel width may be 0 width when rendering.
This issue will be more obvious when you turn on the unicode font in language settings (or you are under some unicode-only language like Chinese), with the game's window height less than 960 px.

To fix this, my suggestion is: Please use 1.0x or 2.0x scale ratio when rendering the font.

I can't.
I might add special case languages where the font is scaled at 1.0 though, if you tell me which that would be. That's the only possibility.