  The inner structures of the multiquark states are an interesting subject in
hadron physics, generally they may be in tetraquark states which are composed
of colored constituents, or in molecular states which are composed of two color
singlets, or their mixtures. Therefore, the mechanisms which bind the
constituents in a unique system and induce the multiquark states to decay would
be different in those cases. In this work, using the quantum mechanics we
analyze the dynamical mechanisms inducing decays of the tetraquarks where
$Y(4630)$ stands as an example for the study, we also comment on the molecular
states without making numerical computations.
