Fonts of zh problem in Unix

[wtlin2015]

When compiling with ubuntu 16.04, 18.04, 20.04 and CentOS 8, the Chinese characters in the output PDF cannot be displayed normally.
If we want to compile successfully, we must first modify the code of NCTUtran.cls in the "Class" folder
\setCJKmainfont {AR PL UKai TW} to \setCJKmainfont {Arial}
\setCJKsansfont {AR PL UMing TW} to \setCJKsansfont {Arial}
and install font Arial.
It can be found during the compilation process,

1. Unix does not support whitespace to separate multiple fonts,
2. The corresponding table for the acronym AR cannot be found.