How to add or replace the html editor?

Hi, I have used the nopcommerce 2.8 now, it is great, but the html editor (tinymce) is not fit me, I am in China, I find some free editor just like kindeditor or Ueditor.
How do I add or replace the editor, I know I need to modify the code of the RichEditor.cshtml and add file to content/editors/, but I don't know how to change the code of RichEditor.cshtml!