Motivated by the large rates of B→*(Xc0,Xc2,hc)K decays observed by the BABAR and Belle collabora-tions,we investigate the nonfactorizable contributions to these factorization-forbidden decays,which can occur through a gluon exchange between the cc system and the spectator quark.Our numerical results demonstrate that the spectator contributions are capable of producing a large branching ratio consistent with the experiments.As a by-product,we also study the Cabibbo-suppressed decays,such as B →(Xc0,Xc2,hc)π and the U-spin-related Bs decay,which have so far received less theoretical and experimental attention.The calculated branching ratios reach the or-der of 10-6,which is within the scope of the Belle-Ⅱ and LHCb experiments.Further,the CP-asymmetry parameters are also calculated for these decays.The obtained results are compared with the available experimental data and num-bers from other predictions.We also investigate the sources of theoretical uncertainties in our calculation.