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For the $nnnc\\bar{c}$ pentaquark with $I=1/2$, we find that (i) the lowest state is $P_{c}(4327.0,1/2,1/2^{-})$ [We use $P_{c}(m,I,J^{P})$ to denote the $nnnc\\bar{c}$ pentaquark], which corresponds to the $P_{c}(4312)$. Its dominant decay mode is $\\Lambda_{c}\\bar{D}^{*}$. (ii) We find two states in the vicinity of $P_{c}(4380)$. 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