\begin{document}$h_2$\end{document} is the SM-like Higgs, \begin{document}$\tilde{\chi}^0_1$\end{document} is a singlino-dominated LSP; \begin{document}$\tilde{\chi}^{\pm}_1$\end{document} and \begin{document}$\tilde{\chi}^0_{2,3}$\end{document} are mass-degenerated, light, and higgsino-dominated next-to-lightest supersymmetric particles (NLSPs). We investigate the constraints of these NLSPs by searching for supersymmetry particles at the LHC Run-I and Run-II and discuss the possibility of discovering these NLSPs in the future. We arrive at the following conclusions: (i) With all data of Run I and up to \begin{document}$36\;{\rm{fb}}^{-1}$\end{document} data of Run II at the LHC, the search results by ATLAS and CMS still cannot exclude the higgsino-dominated NLSPs of \begin{document}$100\sim200\;{\rm{GeV}}$\end{document}. (ii) When the mass difference with \begin{document}$\tilde{\chi}^0_{1}$\end{document} is smaller than \begin{document}$m_{h_2}$\end{document}, \begin{document}$\tilde{\chi}^0_{2}$\end{document} and \begin{document}$\tilde{\chi}^0_{3}$\end{document} have opposite preferences with regard to decaying to \begin{document}$Z/Z^*$\end{document} or \begin{document}$h_1$\end{document}. (iii) When the mass difference between NLSP and LSP is larger than \begin{document}$m_Z$\end{document}, most samples can be verified at the \begin{document}$5\sigma$\end{document} level with future \begin{document}$300\;{\rm{fb}}^{-1}$\end{document} data at the LHC. Meanwhile, with \begin{document}$3000\;{\rm{fb}}^{-1}$\end{document} data at high-luminosity LHC (HL-LHC), almost all of the samples can be verified at the \begin{document}$5\sigma$\end{document} level, even if the mass difference is insufficient. (iv) The \begin{document}$a_1$\end{document} funnel and the \begin{document}$h_2/Z$\end{document} funnel mechanisms for the singlino-dominated LSP annihilation cannot be distinguished by searching for NLSPs."> Light higgsino-dominated NLSPs in semi-constrained NMSSM -
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