Redshift distributions of the KiDS-1000 gold galaxy sample (solid and dashed lines) and CIB emissions (dotted lines). Solid lines are the redshift distribution of the KiDS galaxies calibrated by the SOM without specifying lensing weight and are the redshift distributions we use in this work. For comparison, we show in dashed lines the redshift distributions from the SOM calibration with lensing weight, which are used in the standard KiDS-1000 cosmological analyses. Coloured bands show the z_B ranges of corresponding tomographic bins. Dotted lines are dI_ν/dz at 353, 545, and 857 GHz calculated from Eq. (22) with the best-fit parameters in this work. The values follow the right y axis.