Use \usapackage in jupyter notebook

[LittleNewton]

Hi,

I'm a Chinese user. In my notebook, there are some Chinese characters. When I download these jupyter notebooks as LaTeX .tex file, I need to add a line in the .tex file as

\usepackage{ctex}

If not do like this, the XeTeX compiler will go wrong.

Could it be possible to add this syntax at the .tplx file?