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The recent abundant observations of pentaquarks and tetraquarks byhigh-energy accelerator facilities indicate the realization of the conjectureby Gell-Mann and Zweig, and by De Rujula, Georgi and Glashow [1-3]. Weconstruct a coupled-channel model for the hidden-charm pentaquarks withstrangeness whose quark content is $udsc \bar c$, $P_{cs}$, described as $\Lambda_c \bar{D}_s^{(*)}, \Xi_c^{('*)} \bar{D}^{(*)}$ molecules coupled to thefive-quark states. These molecules are formed by the suitable cooperation ofheavy quark and chiral symmetries. We reproduce the experimental mass andquantum numbers $J^P$ of $P_{cs}(4338)$ for which LHCb has just announced thediscovery. We make other predictions for new $P_{cs}$ states as molecularstates near threshold regions that can be studied by LHCb.

Rich structure of the hidden-charm pentaquarks near threshold regions