General relativity establishes that mass and energy curve four-dimensional spacetime, and gravitation arises as a geometric consequence of spacetime curvature. Gauge field theory describes electromagnetic fields via fiber bundle geometry, where the field-strength tensor corresponds to curvature on the internal fiber space.

Nevertheless, conventional theories treat spacetime as the base manifold, while electromagnetic fields exist only as upper-layer fiber structures attached to spacetime, lacking a common geometric origin.

This work proposes that electric charge, the source of electromagnetic interaction, induces intrinsic geometric curvature of the electromagnetic field. The Coulomb force emerges as the apparent dynamical effect of charged objects moving along geometric geodesics within the curved electromagnetic field. Both gravitational spacetime curvature and gauge field curvature can be interpreted as hierarchical projections of the multi-origin high-dimensional mother space within the MOC framework, unified by the Unified Equation of Charge and Mass-Energy.