15 years of deep-tilled AI training data, focusMedical AI, intelligence and lawThree core tracks. End-to-end services from data collection, cleaning and de-identification, and intelligent annotation to expert final review, providing trustworthy data infrastructure for frontier AI models.
Data that experts trust.
With medical AI data at the core and embodied AI and legal as the two wings — Langhui underpins next-generation AI system training with professional data capabilities.
Million-scale health-checkup datasets + MVD surgical video annotation + a medical expert panel, covering the full chain of imaging diagnosis, assisted diagnosis and treatment, and drug R&D. From CT image annotation to WSI pathology slide review, delivering clinically usable data for medical AI models.
Robot scenario data collection + action and behavior annotation + multimodal alignment. Self-developed capture hardware + LiDAR point-cloud annotation, covering humanoid robots, industrial robotic arms and service robots across all scenarios.
Intelligent legal document annotation + contract review datasets + a legal expert network, covering the full range of compliance review, case analysis and contract auditing. Compliance-driven annotation with full-scenario legal coverage.
From chief physicians to PE/VC partners, industry experts across 22 major professional domains provide the final validation of human intelligence for AI model training.
Credential verification + professional testing + hands-on assessment + continuous rating, with a pass rate below 25%, ensuring every expert reaches industry-leading standards.
AI-powered matching plus a 2-hour rapid-response mechanism — from requirement submission to expert matching, average response time is under 2 hours.
Covering 22 major professional domains including medicine, law, engineering and education, with experts ranging from chief physicians to PE/VC partners.
Real collaboration outcomes from partners in medical AI, foundation model R&D and beyond — not anonymous testimonials, but quantifiable data value.
Provided CT image annotation datasets for the medical imaging algorithm team of a leading AI enterprise, with annotation accuracy meeting clinically usable standards, supporting lung nodule detection model training.
Three years of collaboration with the pathology department of a tertiary hospital; the 7,600+ expert network matches chief physicians to deliver professional-grade review opinions on every WSI — a level of quality that is rare in the industry.
Provided STEM math problem production platform data for the reasoning-capability R&D team of a major AI foundation model company, spanning the full difficulty range from high-school competitions to master's and doctoral level, supporting reasoning model training.
More than a data annotation factory — Langhui drives data with research and feeds research with data, building an industry knowledge flywheel.
Drawing on Langhui's 15 years of medical data service experience, a systematic analysis of quality standards, evaluation methods and industry trends for medical AI training data.
Coming SoonA high-quality annotated lung CT sample set open to the research community, containing expert-level annotations and quality-control metadata, advancing the standardization of medical AI data.
Open Source PreviewExploring how the legal domain can build a traceable and explainable evidence loop through high-order annotation — from entity recognition to causal reasoning.
Read full textFrom frontier model alignment to embodied AI, from multimodal understanding to Agentic AI, Langhui underpins next-generation AI system training with professional data capabilities.
CoT reasoning traces, expert RLHF, SFT demonstration data, adversarial red-teaming.
Golden trajectory data, RL environment design, failure mode taxonomy, in-depth SWE evaluation.
Expressive TTS synthesis, emotion detection, multi-dialect speech, 500+ international languages.
Fine-grained VLM training data, image-text contrastive pairs, spatiotemporal video annotation.
LiDAR point-cloud annotation, multi-sensor fusion, robot demonstration trajectories.
Hallucination benchmarking, compliance auditing, bias detection, continuous monitoring.
Bounding boxes, keypoints, semantic segmentation, OCR annotation, consecutive video frames.
Intent classification, QA pairs, semantic segmentation, speech recognition, video classification.
Not a certification you can simply buy, but an administrative entry barrier — Langhui backs data compliance with national-level qualifications.
Qualifications at the national administrative level
Information security management system
Software capacity maturity model
Four-Tier Review Access
Years of professional accumulation, from traditional data annotation to frontier AI data infrastructure — Langhui continues to drive the industry forward.
From data browsing to custom solutions, there is always one that fits your needs.
Embodied AI Data Collection · Contact
Changsha Langhui Information Technology Co., Ltd.
With trustworthy data as the foundation, expert intelligence as the benchmark, and a compliance system as the moat, delivering high-quality training data for frontier AI models.