Abstract
<p>This paper presents point-by-point responses to four fundamental physical issues raised by Professor Zhong. First, the gravitational mechanism formula—expressed in an extremely concise mathematical form—identifies the gravitational field radius as the key to uncovering the physical essence of gravity. Second, Einstein's field equations suffer from issues including triple-pole singularities and data fitting; consequently, his derivation of Mercury's perihelion precession does not validate general relativity. Within the framework of the new gravitational field theory and incorporating the gravitational field delay effect, we compute Mercury's perihelion precession as 43.06". per century, consistent with observational data. Third, the short‑range nature of strong and weak interactions arises from the combined effects of the field's inherent inverse‑square law and quantum‑scale phenomena (quark confinement, Yukawa potential), rather than a violation of the inverse‑square law. Fourth, all four fundamental forces obey the field point divergence principle: the field spheres generated by any two massive bodies at a given instant are identical in size, and the field radius is fully independent of the mass and volume of the field source.</p>