Can not output Chinese character in paragraphs that also contain English characters

[mediter]

modified the settings related with PDF to:

"PDF": {
            "scope": {
              "text.html": "html",
              "text.html.markdown": "markdown"
            },
            "pandoc-arguments": [
              "-t", "pdf",
              "--latex-engine=/Library/TeX/texbin/xelatex",
              "--filter", "/usr/local/bin/pandoc-citeproc",
              "-V", "mainfont=Kai"
            ]
 },

the output file still shows whitespaces where there are Chinese characters in paragraphs that also contain English characters.

I am using Sublime Text 3 with pandoc on a Mac with macOS Sierra.

[tan-wei]

Please use a valid mainfont in your system. It seems Kai in your arguments is not OK for Chinese.