  New measurements on cross sections in $e^+e^-\to J/\psi\pi^+\pi^-$,
$h_c\pi^+\pi^-$, $D^0D^{*-}\pi^++c.c.$, $\psi(2S)\pi^+\pi^-$, $\omega\chi_{c0}$
and $J/\psi\eta$ channels have been carried out by BESIII, Belle and BABAR
collaborations, and also in the $D_s^*\bar D_s^*$ channel. We perform extensive
numerical analyses by combining all these data available, together with those
in $D\bar D^*$ and $D^*\bar D^*$ channels. Though the latter show no evident
peak around $\sqrt{s}=4.230$ GeV, the missing $X(4260)$ is explained as that it
is concealed by the interference effects of the well established charmonia
$\psi(4040)$, $\psi(4160)$ and $\psi(4415)$. Our analyses reveal that the
leptonic decay width of $X(4260)$ ranges from $O(10^2)$ eV to $O(1)$ keV, and
hence may be explained in the conventional quark model picture. That is, the
$X(4260)$ may well be interpreted as a mixture of $4^3S_1$ and $3^3D_1$ states.
