After the oxygen nucleus O-16, which is the first upper-order nucleus, the calcium nucleus Ca is the second upper-order one. Its structure is based on the successive conversions of fluorine F, magnesium Mg and silicon Si-28 into calcium nucleus Ca. From this second upper-order nucleus the third one is constructed (tin nucleus Sn) and from the third the fourth one (orion nucleus Or-307), according to the mirror symmetry. The atomic numbers Z of the above four upper-order nuclei are the so-called four "magic numbers", i.e. Z1=8, Z2=8x2.5=20, Z3=20x2.5=50 and Z4=50x2.5=125. It is noted that, this orion nucleus Or-307 with a differential atomic number Z=125 (unified theory of dynamic space) is the corresponding "hypothetical unbihexium Ubh", whose atomic number is Z=126 (Nuclear Physics). However, the number 125 looks symmetrical and not magical at all, due to the 2.5 factor (Fig. 5).