Our Recombinant Human FGF basic Superior Stable Mutant Protein, developed via an AI-modified and experimentally validated closed-loop efficient protein design platform, is the optimal FGF2 mutant with superior thermal stability and activity compared to wild-type FGF2, making it more suitable for various stem cell culture processes. This reduces medium replacement frequency, lowers contamination risks from frequent operations, and saves costs/time for stem cell culture by minimizing reagent consumption and labor, especially in large-scale applications.