  The classical quenched quark models with three constituent quarks provide a
good description for the baryon spatial ground states, but fail to reproduce
the spectrum of baryon excited states. More and more evidences suggest that
unquenched effects with multi-quark dynamics are necessary ingredients to solve
the problem. Several new hyperon resonances reported recently could fit in the
picture of penta-quark states. Based on this picture, some new hyperon excited
states were predicted to exist; meanwhile with extension from strangeness to
charm and beauty, super-heavy narrow $N^*$ and $\Lambda^*$ resonances with
hidden charm or beauty were predicted to be around 4.3 and 11 GeV,
respectively. Recently, two of such $N^*$ with hidden charm might have been
observed by the LHCb experiment. More of those states are expected to be
observed in near future. This opens a new window in order to study hadronic
dynamics for the multi-quark states.
