citation works in a wrong way if you compile it by xelatex on macOS

[fucusy]

citation works in a wrong way if you compile by xelatex when you add or remove some bib in ref.bib.

However, I already found solutions. What you need to do is run the four commands below, suppose your tex filename is Template.tex

xelatex Template.tex
bibtex Template
xelatex Template.tex
xelatex Template.tex

see more from this StackOverflow thread

So, I thought some of you may update the readme?

[weiquanmao]

This is a typical toolchain for compiling with TeX and BibTeX, similar to pdflatex>bibtex>pdflatex>pdflatex for pdfLaTeX.

Anyway, thanks for your report!