If the universe is composed only of 2 point-particles of positive and negative electric charge, say, an electron and a positron then the net electric charge of this 2-particle system is zero. Add 1 electron to the system; the net electric charge is -1. On the other hand, adding one positron; the net charge is +1. Adding equal amount of positive and negative charges increase the charge density but the net electric charge remains zero. Adding infinitely equal amount of positive and negative the net electric charge remains an absolute global gauge invariance of perfect symmetry. However, in the local infinitesimal region the charge distribution of positive and negative needs not be uniform. Therefore, local relative gauge invariance of electric charge is not a conserved physical quantity. Preserving this local relative gauge invariance, can only lead to the formulation of a non-Abelian Yang-Mills quantum field theory for mass generations of spontaneous broken local symmetries.