Redshift evolution of SM-FP for the spheroidal galaxies in HR5. Note that galaxies are located along the diagonal line as the best-fit FP coefficients are used at each redshift. The relation moves to the right as galaxies grow in size with time. Left: For the massive sub-sample with M_* > 1 × 10¹¹ M_⊙Right: For the sample with M_* > 2 × 10⁹ M_⊙. To mitigate the overlap of points, black contours are plotted for the initial five redshifts, representing the central 90% of galaxies contained within.