Light meson decays at BESIII

The world’s largest sample of $J\mathrm{/}\psi$ events accumulated at the BESIII dector offers a unique opportunity to investigate $\eta$ and ${\eta }^{\mathrm{\prime }}$ physics via two body $J\mathrm{/}\psi$ radiative or hadronic decays. In recent years the BESIII experiment has made significant progresses in $\eta \mathrm{/}{\eta }^{\mathrm{\prime }}$ decays. A selection of recent highlights in light meson spectroscopy at BESIII are reviewed in this report, including the observation of ${\eta }^{\mathrm{\prime }}\to {\pi }^{+}{\pi }^{-}{\mu }^{+}{\mu }^{-}$, the study of ${\eta }^{\mathrm{\prime }}\to {\pi }^{+}{\pi }^{-}{e}^{+}{e}^{-}$, and search for $CP$-violation in this decay, search for the rare decays of ${\eta }^{\mathrm{\prime }}\to 4{\pi }^0$ and ${\eta }^{\mathrm{\prime }}\to \gamma \gamma \eta$, as well as the precision measurement of the branching fraction of ${\eta }^{\mathrm{\prime }}$ decays.