  Combining the quark model, the quark-pair-creation mechanism and $B^{(*)}\bar
K$ interaction, we have investigated the near-threshold $P$-wave $B_s$ states
in the framework of the Hamiltonian effective field theory. With the heavy
quark flavor symmetry, all the parameters are determined in the $D_s$ sector by
fitting the lattice data. The masses of the bottom-strange partners of the
$D^{*}_{s0}(2317)$ and $D^{*}_{s1}(2460)$ are predicted to be
$M_{B^{*}_{s0}}=5730.2_{-1.5}^{+2.4}$ MeV and $M_{B^{*}_{s1}}=
5769.6_{-1.6}^{+2.4}$ MeV, respectively, which are well consistent with the
lattice QCD simulation. The two $P$-wave $B_s$ states are the mixtures of the
bare $\bar b s$ core and $B^{(*)}\bar K$ component. Moreover, we find a
crossing point between the energy levels with and without the interaction
Hamiltonian in the finite volume spectrum in the $0^+$ case, which corresponds
to a CDD (Castillejo-Dalitz-Dyson) zero in the $T$-matrix of the $B\bar K$
scattering. This CDD zero will help deepen the insights of the near-threshold
states and can be examined by future lattice calculation.
