Recent Results on Hadron Spectroscopy and Charmonium from BESIII

pp̄ mass threshold enhancement is studied using the data sample of J/ψ and y(2S) collected with BESIII detector in 2009. The enhancement is evident in J/ψ radiative decay, which is consistent with BESII results. No significance narrow enhancement is observed in ψ(2S) radiative decay. The structure of Xlpar;1835) is also confirmed in $J/ψ = γη̗π+π−$ at BESIII. The spin‐singlet P‐wave charmonium state $hc(1P )$ is studied at BESIII, the mass spectra recoiling against the $π0$ in the decay $ψ(2S) = π0hc$ both in $hc$ inclusive decay and in the final states with a tagged E1‐transition photon from $hc → γηr$ are fitted to extract the number of hc signals.