Evolutionary trend of the hot corona radius R_HC (left), warm corona radius R_WC (middle), and warm corona “size” log(R_WC² − R_HC²) (right) on the 3 × 3 M_BH-λ_Edd grid. The color is linearly interpolated for visualizing trends. The two low λ_Edd – high M_BH bins are grayed out for star-forming contamination (see text for details), except for which the warm corona radius shows a clear increasing trend with increasing λ_Edd and decreasing M_BH. The hot corona radius decreases with increasing λ_Edd while remains constant for different M_BH.