  The hadronic decay branching ratios of $J/\psi$ and $\psi(2S)$ through
virtual photons, $B(J/\psi, \psi(2S) \rightarrow \gamma^*\rightarrow
\text{hadrons})$, are updated by using the latest published measurements of the
$R$ value and the branching ratios of $J/\psi, \psi(2S) \rightarrow l^+l^-$.
Their respective precision increases by about 4 and 3 times.
