X Square Robot (Zibianliang Robotics) is a Chinese embodied-AI startup founded in 2023 in Shenzhen, building end-to-end foundation models for general-purpose robots. Its flagship model family, WALL, aims to give robots broad reasoning and physical-action capabilities, and in September 2025 the company released WALL-OSS, an open-source foundation model for robotic platforms, alongside demonstrations of robots tackling home-based tasks. Co-founded by Wang Qian with CTO Wang Hao (a computational-physics PhD from Peking University), X Square positions itself as a challenger to Figure AI and Boston Dynamics by emphasizing a software-first, model-driven approach to embodied intelligence. The company has raised substantial capital across 2025-2026: a roughly $100 million round with Alibaba leading, a $140 million Series A extension with investors including ByteDance, and a $293 million Series B co-led by Xiaomi and HSG (HongShan). The funding supports mass-production of embodied-AI robots and continued development of its robot foundation models. X Square was named to the Forbes China 2026 AI Tech Enterprises Top 50.