Observation of the decays \(\chi_{cJ}\to n K^{0}_{S}\bar\Lambda + c.c.\)

By analyzing \(4.48\times10^8\) \(\psi(3686)\) events collected with the BESIII detector, we observe the decays \(\chi_{cJ} \to n K^0_S\bar\Lambda + c.c.\) (\(J=0\), 1, 2) for the first time, via the radiative transition \(\psi(3686) \to \gamma \chi_{cJ}\). The branching fractions are determined to be \((6.67 \pm 0.26_{\rm stat} \pm 0.41_{\rm syst})\times10^{-4}\), \((1.71 \pm 0.12_{\rm stat} \pm 0.12_{\rm syst})\times10^{-4}\), and \((3.66 \pm 0.17_{\rm stat} \pm 0.23_{\rm syst})\times10^{-4}\) for \(J=0\), 1, and 2, respectively.