  We present a lattice QCD study of hidden-charm hexaquarks with quark content
$usc\bar{d}\bar{s}\bar{c}$ based on four ensembles of gauge configurations
generated by CLQCD Collaboration with pion mass in the range of 220-300MeV.
Four operators with quantum numbers $0^{++}, 0^{-+}, 1^{++}$ and $1^{--}$
respectively are constructed to interpolate the hexaquarks. After validating
the spectrum and the dispersion relation for ordinary hadrons, we calculate the
masses of the hexaquarks and extrapolate the results to the physical pion mass
and the continuum limit. We find that the masses of the four hexaquarks are all
below the $\Xi_c \bar \Xi_c$ threshold, while the $0^{-+}$ hexaquark lies
around the $\eta_c K^+K^-$ threshold. These results will be helpful for
experimental searches in future and for a deep understanding of the nature of
multiquark states.
