Dr. Qingling Ni graduated from the Pennsylvania State University in 2021. She will start a postdoctoral position at the University of Edinburgh this fall. She is interested in utilizing extragalactic surveys to characterize AGN activity and the coevolution between black holes and galaxies.Recent studies show that a universal relation between black-hole (BH) growth and stellar mass (M*) or star formation rate (SFR) is an oversimplification of BH-galaxy coevolution, and that morphological and structural properties of host galaxies must also be considered. Particularly, a possible connection between BH growth and host-galaxy compactness was identified among starforming (SF) galaxies. Utilizing galaxies in the COSMOS field with Chandra coverage, we perform systematic partial-correlation analyses to investigate how sample-averaged BH accretion rate (BHAR) depends on host-galaxy compactness among SF galaxies, when controlling for M* or SFR. The projected central surface-mass density within 1 kpc, Σ1, is utilized to represent host-galaxy compactness in our study. We find that the BHAR-Σ1 relation is stronger than either the BHAR-M* or BHAR-SFR relation among SF galaxies. This BHAR-Σ1 relation among SF galaxies suggests a link between BH growth and the central gas density of host galaxies on the kpc scale, which may further imply a common origin of the gas in the vicinity of the BH and in the central ~kpc of the galaxy. This BHAR-Σ1 relation can also be interpreted as the relation between BH growth and the central velocity dispersion of host galaxies at a given gas content, indicating the role of the host-galaxy potential well in regulating accretion onto the BH. In this talk, I will also present the latest results from the XMM-SERVS survey, which is a ~50 ks depth XMM-Newton survey across ~13 deg^2. The XMM-SERVS survey provides a sample of ~10,000 AGNs that have extensive multiwavelength data coverage, enabling studies of BH growth in multidimensional space of galaxy parameters and across the full rang