The McKay conjecture, which relates to the representation theory of finite groups, has finally been solved after two decades of effort by a dedicated couple of mathematicians. The conjecture posits a deep connection between finite groups and their representations in terms of simple algebraic structures. This significant breakthrough not only advances our understanding of group theory but also opens up potential applications in various fields, including cryptography and combinatorial games. The achievement underscores the importance of persistent research collaboration and could inspire new interdisciplinary approaches to mathematical problems.