A research team led by Professor Peng Chenhui and Researcher Jiang Jinghua from the School of Physics at the University of Science and Technology of China (USTC), in collaboration with Professor Zhang Rui from the Hong Kong University of Science and Technology, achieved controllable nucleation of fractional skyrmion rings and topological monopoles at room temperature in a nematic liquid crystal system. This process can be precisely triggered by three methods: light, electric field, and local heating. The results were published in Physical Review Letters on May 12, 2026, and selected as an Editor's Suggestion and featured in Physics. The research team designed a liquid crystal cell with top-bottom asymmetric topological patterns. By rotating the upper surface orientation with linearly polarized light, elastic distortions accumulated within the liquid crystal. When the distortion stress reached a critical threshold, the topologically trivial initial texture deterministically nucleated into stable three-dimensional fractional skyrmion rings. Experimental and simulation results revealed that this topological phase transition was accompanied by a 2π distortion discontinuity and significant energy reduction. Moreover, the cross-section of the skyrmion rings could continuously evolve among various topological morphologies. Additionally, the team confirmed the multi-field universality of this topological nucleation mechanism. Besides light fields, applying low-frequency alternating electric fields or local laser heating could also precisely trigger skyrmion ring nucleation, simultaneously generating a pair of topological monopoles that migrated autonomously along the ring to minimize the system's free energy. This achievement marks the first time in soft matter systems that the generation of topological solitons has been transformed from 'random and accidental' to 'controllable and deterministic,' overcoming the high-energy barrier challenges that are difficult to surmount in solid-state systems. It opens up entirely new technological pathways for reconfigurable topological photonic devices, topological metamaterials, and low-power information storage.