Jin jang

\documentclass[tikz]{standalone}

\begin{document}

\begin{tikzpicture}

\draw (0,0) circle [radius= 2];
\fill[black] (0,-2) arc (-90:90:2);

\fill (0, -1) circle [radius=1];
\fill[white] (0,-1) circle [radius=0.2];

\fill[white] (0, 1) circle [radius=1];
\fill[black] (0, 1) circle [radius=0.2];


\end{tikzpicture}

\end{document}