\usepackage[UTF8,fontset=fandol,scheme=plain]{ctex}
\usepackage{amsmath,amssymb,bm}
\usepackage[normalem]{ulem}
\usepackage{tikz}
\usepackage{pgfplots}

\pgfplotsset{compat=1.18}
\usetikzlibrary{
  arrows.meta,
  backgrounds,
  calc,
  decorations.pathreplacing,
  fillbetween,
  fit,
  intersections,
  positioning,
  shapes.geometric
}
\input{figure_style.tex}
