Recent Results on J/ψ Decays from BESII

A number of significant enhancements near baryon-antibaryon, meson-baryon and meson-meson mass thresholds are reported using 58 million J/ψ events collected at BES II detector. The production of σ and κ in J/ψ decays and the study of the excited baryon states are presented too. We also report the measurements of J/ψ and ηc decays, of them some are the first measurements and some improve the precision in previous measurements.