2019 September 12
2019 September 26
In recent years, a new class of exotic charmonium-like states, also referred to as $XYZ$ states, have been discovered. Being incompatible with the simple quark-antiquark model, they are candidates for non-standard hadrons such as tetraquarks, meson molecules, and hybrids. The BESIII experiment operating at the electron-positron collider BEPCII at IHEP (Beijing) has accumulated a large amount of data in the tau-charm mass region and offers unique access to the study of $XYZ$ states. In this proceeding, the latest results on $XYZ$ states at BESIII are presented.