  Recently, the standard model predictions for the $B$-meson hadronic decays,
$\bar{B}^0 \to D^{(\ast)+}K^-$ and $\bar{B}^0_s \to D^{(\ast)+}_s \pi^-$, have
been updated based on the QCD factorization approach. This improvement sheds
light on a novel puzzle in the $B$-meson hadronic decays: there are mild but
universal tensions between data and the predicted branching ratios. Assuming
the higher-order QCD corrections are not huge enough to solve the tension, we
examine several new physics interpretations of this puzzle. We find that the
tension can be partially explained by a left-handed $W^\prime$ model, which can
be compatible with other flavor observables and collider bounds.
