Chinese character doesn't display normally

[Ereebay]

When I input the Chinese character,it shows normally at first.But after closing the tab and open it again,it will be garbled.

Closing the tab,open it again,it's garbled.

I debug the mod in the IDEA and it doesn't show this problem.

[TheCodedOne]

This is an issue with minecraft not using utf8 by default, intellij by default forces utf8 which is why it doesnt happen, theres not much i can really do as its a java argument which i cannot modify

[Ereebay]

I force the minecraft to launch by using utf8 and it works well now.Maybe the mods need to judge the users's format before saving the json.