In his later years, Albert Einstein devoted himself to the pursuit of a unified theory to explain all fundamental interactions, firmly believing in the principle of simplicity in nature. He sought to integrate the four known interactions-gravitational, electromagnetic, strong nuclear, and weak nuclear-into a single theoretical framework, uncovering the origin of these forces. Regrettably, this ambitious endeavor remained incomplete at the time of his death in 1955.
This book presents a comprehensive vision of a unified theory-a Theory of Everything-based on a fundamental particle called the "Yuan." This theory elucidates the origins of the four fundamental interactions and the core composition of all matter in the universe.