  Recent advancements in charmoniumlike state have significantly enriched the
discovery of new hadronic states, providing exciting opportunities for further
investigations into the fascinating realm of charmonium physics. In this
letter, we focus on the vector charmonium family and perform a detailed
analysis of the recently observed $e^+e^-\to \pi^+ D^0 D^{*-}$ process. Our
findings demonstrate a striking agreement between the observed peak structures
and the predicted characterized energy level structure of higher vector
charmonia including the $\psi(4220)$, $\psi(4380)$, $\psi(4415)$, and
$\psi(4500)$, which are derived from an unquenched potential model. This
discovery challenges conventional understanding of higher charmonia above 4 GeV
and offers fresh insights into the dynamics of charm and anti-charm quarks in
the formation of these states. Furthermore, the identification of these higher
charmonia in the precisely measured $\pi^+ D^0D^{*-}$ open-charm decay channel
would serve as compelling evidence supporting the unquenched scenario and
contribute to a deeper understanding of the nonperturbative aspects of the
strong interaction.
