Distributions of the identified BL Lacs and FSRQs in 3LAC in the z-score ﹩{\tilde{{\rm{\Gamma }}}}_{\gamma }-{\tilde{\alpha }}_{{\rm{r}}\gamma }﹩ plane. The black circles, red triangles, blue triangles, green triangles, and magenta triangles stand for FSRQs, HSP–BL Lacs, ISP–BL Lacs, LSP–BL Lacs, and BL Lacs without ﹩{\nu }_{{\rm{s}}}﹩ value available, respectively. The centroid points (red stars) and the ﹩{p}_{i,{\rm{c}}}﹩ contours of FSRQs and BL Lacs are shown in the upper panel. The contours of likelihood measurement ﹩{\rho }_{{\rm{s}}}﹩ are shown in the lower panel.