Qisi gave an invited talk at the ICAM-China Workshop on High-T_c Superconductor and Correlated Electron Systems, held at The Chinese University of Hong Kong. In his presentation, “Spin and orbital excitations of nickelate superconductors,” he discussed our recent resonant X-ray scattering studies of infinite-layer and Ruddlesden-Popper nickelates, comparing their magnetic interactions and electron correlations with those of the cuprates.