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