Simulated PCs from the variations of different parameters in the relativistically smeared reflection model. When we first vary the parameter Nor_relxillCp, there is a significant PC above zero (panel A). The second pivoting component comes out when we further set the power-law index Γ free to change (panel B). In panel C, we show the four components in the case that log(ξ), log(N), and R_refl in the continuum RELXILLCP are also set free to vary. We finally change the free parameters in the absorption model ZXIPCF and ZEDGE and show the corresponding PCs in panel D. In the figure, we used cyan curves to show the first two PCs from the real data for comparison.