Redshift distribution of all 901 AGNs in the Lyu et al. (2022) catalog (purple histogram). This large AGN dataset includes all nine categories of AGN defined in Lyu et al. (2022). Note: the categories are not mutually exclusive, i.e., a given AGN can satisfy the selection criteria for multiple categories of AGNs. The redshift values for these AGNs are sourced from the Lyu et al. (2022) catalog. We also overplotted the redshift distribution of 591 Lyu et al. (2022) AGNs that are matched with the C3VO (MUSYC) sources within a projected separation of 0.5 (orange histograms with purple lines). The redshift distribution peaks around z ∼ 0.75, and almost vanishes at z > 4. In this study, we restricted our analysis to the redshift range of 2.0 < z < 4.0 as shown by the gray shaded region between the two black dashed vertical lines.