The UBTECH Walker C1 is described as the world’s first full-size humanoid service robot designed for urban symbiosis, combining functional aesthetics with exceptional mobility and agility. It is powered by a multimodal intelligence engine driven by advanced AI models and cutting-edge embodied AI technologies. A built-in motion library supports dynamic multi-modal movements with customizable motion settings. It features full-stack openness with standard interfaces and a comprehensive SDK for flexible customization across diverse scenarios. Modular design with cross-model compatibility and mass production capacity enables rapid delivery and single-person deployment. Applications include commercial services (multilingual reception, AI tour guide, shopping assistance), cultural entertainment (events, themed performances, visitor interaction), urban safety (patrol inspection, traffic assistance), and education and research (smart teaching assistance, R&D platform). It served as the first official humanoid robot representative of the CISCE. Targets reception and entertainment.