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Ten hadronic final states of the $h_c$ decays are investigated via theprocess $\psi(3686)\rightarrow \pi^0 h_c$, using a data sample of $(448.1 \pm2.9) \times 10^6$ $\psi(3686)$ events collected with the BESIII detector. Thedecay channel $h_c\rightarrow K^{+}K^{-}\pi^{+}\pi^{-}\pi^{0}$ is observed forthe first time with a significance of $6.0 \sigma$. The corresponding branchingfraction is determined to be $\mathcal{B}(h_c\rightarrowK^{+}K^{-}\pi^{+}\pi^{-}\pi^{0}) =(3.3 \pm 0.6 \pm 0.6)\times 10^{-3}$ (thefirst uncertainty is statistical and the second systematical). Evidence for thedecays $h_c\rightarrow \pi^{+} \pi^{-} \pi^{0} \eta$ and $h_c\rightarrowK^{0}_{S}K^{\pm}\pi^{\mp}\pi^{+}\pi^{-}$ is found with a significance of $3.6\sigma$ and $3.8 \sigma$, respectively. The corresponding branching fractions(and upper limits) are obtained to be $\mathcal{B}(h_c\rightarrow \pi^{+}\pi^{-} \pi^{0} \eta ) =(7.2 \pm 1.8 \pm 1.3)\times 10^{-3}$ $(< 1.8 \times10^{-2})$ and $\mathcal{B}(h_c\rightarrowK^{0}_{S}K^{\pm}\pi^{\mp}\pi^{+}\pi^{-}) =(2.8 \pm 0.9 \pm 0.5)\times 10^{-3}$$(<4.7\times 10^{-3})$. Upper limits on the branching fractions for the finalstates $h_c \rightarrow K^{+}K^{-}\pi^{0}$, $K^{+}K^{-}\eta$,$K^{+}K^{-}\pi^{+}\pi^{-}\eta$, $2(K^{+}K^{-})\pi^{0}$,$K^{+}K^{-}\pi^{0}\eta$, $K^{0}_{S}K^{\pm}\pi^{\mp}$, and$p\bar{p}\pi^{0}\pi^{0}$ are determined at a confidence level of 90\%.

Search for New Hadronic Decays of $h_c$ and Observation of $h_c\rightarrow K^{+}K^{-}\pi^{+}\pi^{-}\pi^{0}$