Optical r-band AB magnitude vs. the X-ray flux for the final selected sample, shown on the left. Diagonal lines indicate a constant flux ratio between the r-band and X-ray. WISE1–WISE2 color vs. WISE2-band VEGA magnitude, shown on the right. The lines represent the MIR WISE selection criteria, 95% reliability (solid line), 90% reliability (dashed black line), and 75% reliability (dashed green), respectively. Black circles represent the WISE-selected AGNs in this work. For all panels, the grey circles represent the normal galaxies, the red circles the X-ray luminosity selected AGN, blue circles the K band selected AGNs.