Upper panel: distribution of the stellar masses of the CIG galaxies. Middle panel: SHM relation for central galaxies as a function of redshift (Fig. 5 in Moster et al. 2013). Blue solid line, green dashed line, red point-dashed line, cyan pointed line, and magenta pointed line correspond to the SHM relation at redshift 0, 1, 2, 3, and 4, respectively. Black circles correspond to the parametrisation of the SHM relation for CIG galaxies. Lower panel: logarithm of the SHM ratio for CIG galaxies.