epp team members Jorge Vieira and Róbert Babjak went to Zhuhai, China to attend the 6th International Conference on Matter and Radiation at Extremes, held on 5-9 June 2023. Jorge V delivered the plenary talk named Superradiance and temporal coherence in plasma accelerators: New pathways towards FEL brightnesses in plasma. Róbert B presented an invited talk about the connections between laser focusing and efficiency of the direct laser acceleration. Topics covered at the conference were fundamental physics at extreme light, inertial confinement fusion, radiation and hydrodynamics, and others.