Before a Chinese regulator would sign off on a robot "brain" built to control real machines in homes and warehouses, it demanded nearly five months of testing: more than 200,000 corpus and content spot checks, plus 27,148 separate attempts to make the model produce a harmful or high-risk response. Shenzhen-based X Square Robot said its GreatWall general embodied model passed that review on November 12, 2026, becoming the first general embodied AI model in China's Guangdong-Hong Kong-Macao Greater Bay Area to complete the province's generative AI service filing, according to 21st Century Business Herald.
GreatWall is actually a family of models: WALL-B, a unified world model; WALL-WM, a world model; and WALL-OSS, a vision-language-action model. Together, X Square says they fuse vision, language, touch, action and physical prediction into systems designed to transfer across different robot bodies, tasks and environments rather than being retrained for each one. The company says GreatWall is already running at scale in two live settings: home service robots and logistics sorting.
Why a Regulatory Filing Is a Business Milestone
In China, any company offering a generative AI service to the public must register it with provincial cyberspace authorities, a process that scrutinizes training data sourcing, generated content, intellectual property handling, personal data protection, accuracy and risk controls before granting approval. For a chatbot, that filing is largely a compliance formality. For an embodied model controlling physical robots in people's homes, the stakes are different: a failed refusal test means the model attempted an unsafe physical action rather than just generating an inappropriate sentence. Guangdong province now has 230 approved generative AI services on its books, more than any other Chinese province, and X Square's filing is being promoted as the first of those built specifically for general-purpose robot control rather than text or image generation.
The filing gives X Square a regulatory credential it can use when selling GreatWall to enterprise customers who need assurance the model has cleared government safety review, not just internal testing. That matters for a company whose business model depends entirely on licensing its AI "brain" to hardware partners rather than selling robots itself.
The Company Behind the Filing
X Square Robot has become one of China's most closely watched embodied AI startups precisely because of who backs it: Meituan, Alibaba, ByteDance and Xiaomi have each led separate funding rounds, with Xiaomi investing three times, an unusual arrangement in which four rival internet giants all hold stakes in the same robotics brain company. Additional backers include China's National AI Industry Investment Fund, Sequoia China and IDG Capital. The company reached a valuation of roughly $2.75 billion after completing Series B, B+, B++ and C rounds by June 2026, having raised about $344 million in total.
X Square remains an early-stage company by commercial standards, with no large-scale shipments or disclosed profitable deployments yet. The GreatWall filing is a step toward broader commercial rollout rather than a substitute for it, but it clears a regulatory hurdle that rivals pursuing similar general-purpose robot models in China will also have to pass before competing for the same enterprise customers.