  Recently, the LHCb Collaboration reported a new structure $P_{cs}(4459)$ with
a mass of 19 MeV below the $\Xi_c \bar{D}^{*} $ threshold. It may be a
candidate of molecular state from the $\Xi_c \bar{D}^{*} $ interaction. In the
current work, we perform a coupled-channel study of the $\Xi_c^*\bar{D}^*$,
$\Xi'_c\bar{D}^*$, $\Xi^*_c\bar{D}$, $\Xi_c\bar{D}^*$, $\Xi'_c\bar{D}$, and
$\Xi_c\bar{D}$ interactions in the quasipotential Bethe-Salpeter equation
approach. With the help of the heavy quark chiral effective Lagrangian, the
potential is constructed by light meson exchanges. Two $\Xi_c \bar{D}^{*} $
molecular states are produced with spin parities $ J^P=1/2^-$ and $3/2^- $. The
lower state with $3/2^-$ can be related to the observed $P_{cs}(4450)$ while
two-peak structure can not be excluded. Within the same model, other strange
hidden-charm pentaquarks are also predicted. Two states with spin parities
$1/2^-$ and $3/2^-$ are predicted near the $\Xi'_c\bar{D}$, $\Xi_c\bar{D}$, and
$\Xi_c^*\bar{D}$ thresholds, respectively. As two states near $\Xi_c
\bar{D}^{*}$ threshold, two states are produced with $1/2^-$ and $3/2^-$ near
the $\Xi'_c\bar{D}^*$ threshold. The couplings of the molecular states to the
considered channels are also discussed. The experimental research of those
states are helpful to understand the origin and internal structure of the
$P_{cs}$ and $P_c$ states.
