You can't choose custom fonts in custom plugins. You can add only by css. How to add custom css for fonts for theme's headings is available in our article. http://rehubdocs.wpsoul.com/docs/rehub-theme/how-to/custom-font-in-theme/
already remove two dotes, but also can not find the font in font family
must be not ../fonts
must be "/fonts/
Remove two dotes
I already add css code in Theme Options > General Options
and already upload fonts file to the root directory with using FTP software.
However, i can choose the new font from the theme, i need Chinese fonts display