2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/37892Multiquark searches have been a hot topic in recent years. Some threshold enhancements were observed during the analysis of 58M $\jpsi$ events collected by BES II detector. These enhancements can't be explained by the standard model and may be candidates of multiquark. BES also contribute a lot to the study of light scalar mesons, such as $σ$,$κ$,$f_{0}(1370)$ and $f_{0}(1710)$ etc. Study of the excited baryon states and measurements of some $\jpsi$ decays are also done with the $\jpsi$ events of BES.4pages,5figures,conference of "QCD and High Energy Hadronic Interactions"High Energy Physics - Experimenttext