Stellar masses vs. halo masses of the BCGs in our sample. Different symbols represent different surveys. The blue shaded symbols show BCGs with 0.1 ≤ z ≤ 0.3 and the red shaded symbols show BCGs with 0.3 <  z ≤ 0.65. The blue dashed and the red dash-dotted lines show the best power-law fits for the low and high redshifts, respectively. The blue and red shaded area around the fitted lines represent 95% confidence levels of the fits. The blue squares and red dots with error bars present the mean of stellar mass of BCGs at a given halo mass. The error bars are their standard errors. The Pearson correlation coefficient is 0.7 for low redshift BCGs and 0.4 for high redshift BCGs.