\begin{document}$J/\psi $\end{document}, a precise determination of the number of \begin{document}$J/\psi $\end{document} events collected with the BESIII detector was performed. For the two data sets taken in 2009 and 2012, the numbers of \begin{document}$J/\psi $\end{document} events were recalculated to be \begin{document}$ (224.0 \pm 1.3)\times10^6 $\end{document} and \begin{document}$ (1088.5 \pm 4.4)\times10^6 $\end{document}, respectively; these numbers are in good agreement with the previous measurements. For the \begin{document}$J/\psi $\end{document} sample taken in 2017–2019, the number of events was determined to be \begin{document}$ (8774.0 \pm 39.4)\times10^{6} $\end{document}. The total number of \begin{document}$J/\psi $\end{document} events collected with the BESIII detector was determined to be \begin{document}$ (10087 \pm 44)\times10^{6} $\end{document}, where the uncertainty is dominated by systematic effects, and the statistical uncertainty is negligible."> Number of <i>J/ψ</i> events at BESIII -
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