Charmonium results from BES

Using ~ 14 × 106 ψ (2S) and ~ 58 × 106 J/ψ data collected at BES II /BEPC, the branching fraction of ψ(2S) → Ω− + is measured with about 5σ statistical significance. The Λ electric dipole and decay parameter are studied using the decay J/ψ → Λ → pπ+π−. Using (106±3) × 106 ψ(2S) decays collected at BESIII/BEPC II, we have obtained some interesting physics results. The branching fractions of χcJ → π0π0, ηη are measured with precision improved. The mass and width of hc(11P1) state, together with the branching fractions of Br(ψ(2S) → π0hc) and Br(hc → γηc) are the first measurements. Surprisingly, the decays of χc1 → ωω, and ω are firstly observed in BESIII data.