In this paper, we discuss the phenomenon that in the photons generated after electron-positron annihilation, the sources of thermal potential energy that make up the electrons and positrons are equally divided. As a result, the photon contains one thermal point each for the electron and positron, and a picture of a single system emerges. This annihilation could be predicted to occur at the point where the two domains intersect if the electron and positron phases are properly aligned on the Riemann surface. Taking advantage of the model in which the interior of the electron radiates and radiates thermophores, the electron-positron annihilation could be likened to an inelastic collision observed from opposite directions in time. In addition, we consider that the oscillation caused by thermal radiation inside the electron cancels out that of the positron, causing the electron and positron to lose mass and transform into a photon.