$\Newextarrow{\xhookrightarrow}{10,10}{0x21AA}$
9.22
\begin{equation} \begin{gathered}\label{equation:factorization-system-on-QCat} \xymatrix { \operatorname{\mathcal{A}}\ar [r] \ar [d]^{F} & \operatorname{\mathcal{C}}\ar [d]^{G} \\ \operatorname{\mathcal{B}}\ar [r] \ar@ {-->}[ur] & \operatorname{\mathcal{D}}} \end{gathered} \end{equation}