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In this paper we assume that $Z_c(3900)$ and $Z_c(4020)$ are molecular states of $D\\bar D^*(D^{*} \\bar D)$ and $D^*\\bar D^*$ respectively, then we calculate the transition rates of $Z_c(3900)\\to h_c+\\pi$ and $Z_c(4020)\\to h_c+\\pi$ in the light front model. 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