At the prestigious 2025 World Artificial Intelligence Conference (WAIC), JD.com made a groundbreaking announcement with the brand evolution of its Yanxi large model to JoyAI. This multifaceted model seamlessly integrates various modalities, encompassing language, speech, images, videos, and digital humans. Leveraging advanced technologies like dynamic layered distillation and cross-domain data governance, JoyAI boasts a remarkable 30% increase in reasoning efficiency and a significant 70% reduction in training costs. The model has witnessed extensive application across diverse sectors such as retail, logistics, healthcare, and industrial domains, serving over a million merchants on JD.com and deeply embedding itself into numerous segmented business scenarios. Furthermore, JD Cloud has taken a pioneering step by officially open-sourcing JoyAgent, an endeavor that encompasses the frontend, backend, frameworks, engines, and core sub-agents, achieving an unprecedented level of product-wide open-source.