Distributions between the morphological stability of the projected distribution within tidal radii of sample clusters on the Y-Z plane and the three axes (X axis, Y axis, and Z axis). ‘GC’ and ‘DR’ represent the Galactic center and the Galactic differential rotation, respectively. The colored scatters with gray error bars denote our sample clusters. The symbols and curves of the picture are the same as those of Fig. 8. It should be noted that the number of samples in each panel is not equal to that of all samples. Because we removed those samples with the central core area $\left(S_{cor{e}_{yz}}\right)$ being Zero.