Number of X-ray sources (upper panel) and fractions of sources (lower) resulted from counterpart quality and redshift quality selections. The red and blue lines indicate counterpart quality ⩾2 and ⩾3. respectively. The solid and dashed lines indicate good (zG ⩾3) and best (zG ⩾4) redshift measurements, respectively. The thick and thin lines indicate sources in the eFEDS 90%-area region and the KiDS region, respectively.