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We discuss the Okubo–Zweig–Iizuka (OZI) rule violation effects in
η
c
?/mml:mo>
V
V
in light of the new data from BES Collaboration. In particular, a possible non-vanishing branching ratio for
η
c
?/mml:mo>
ω
ϕ
provides a hint of the degrees of OZI violations based on a recent factorization proposed for charmonium hadronic decays. The violation mechanism is studied via an intermediate meson exchange model. The results are consistent with the experimental observations.
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