ΔT_eff vs. (BP − RP)₀. The ΔT_{eff_Phot/Spec/HS/LAMOST/APOGEE/GALAH} is defined as T_{eff_Phot/Spec/HS/LAMOST/APOGEE/GALAH}−T_{eff_iso}. The black triangles and error bars indicate the median values and corresponding dispersions within different color bins. The vertical dashed gray lines are the cutoffs between different stellar types. The rainbow color of the points represents the metallicity from individual catalogs with a color bar on the right. The metallicity of the GSP-Phot has been calibrated with the calibration relation from Andrae et al. (2023). Gray points refer to the samples without observational metallicity.