Describe the solution you'd like
Chinese users need "text-indent:2em" style in some paragraph, paragraph block need an option to enable this feature.
Most Chinese paragraphs has this style, but not all. If once enabled, keep it be a default option when type the ENTER button.

Describe alternatives you've considered
I've tried to add a special class to the paragraph, for example: "text-indent-2em", then I add a custom style:
.text-indent-2em {text-indent:2em;}
This alternative need I copy the class and paste it to every paragraph when I use the ENTER button while I am writting a article. If once enabled, It's BEST to keep it be a default option when type the ENTER button