Never use\\, use\noindentif needed.
\documentclass{ctexart}
\usepackage{hanzibox}
\hanziboxset{frametype=咪,framecolor=red,charcolor=red,pinyinline=true,charf=\Huge,pinyinf=\tiny}
\setlength{\parindent}{0pt}%
\begin{document}
\hanzibox{你好}
\hanzibox{你好啊啊啊}
\end{document}或者
\documentclass{ctexart}
\usepackage[showframe]{geometry}
\usepackage{hanzibox}
\hanziboxset{frametype=咪,framecolor=red,charcolor=red,pinyinline=true,charf=\Huge,pinyinf=\tiny}
\begin{document}
\noindent\hanzibox{你好}
\noindent\hanzibox{你好啊啊啊}
\end{document}


















问 宏包hanzibox换行后文字对不齐