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New sum rules up to dimension-six condensates for both the HP decay constants and their leading-twist DA moments are presented. From the sum rules for the HP decay constants, we obtain $f_{\\eta_c} = 453 \\pm 4 \\textrm{MeV}$, $f_{B_c} = 498 \\pm 14 \\textrm{MeV}$, and $f_{\\eta_b} = 811 \\pm 34 \\textrm{MeV}$. 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