Powering LLMs with
Domain Knowledge & Human Intelligence
7,600+ Certified Domain Experts · 22 Vertical Industries · Full-Modal Data Annotation
Delivering high-quality AI training data and RLHF services to accelerate LLM industry deployment
Certified Domain Experts
Certified Suppliers
Delivered Projects
Client Satisfaction
22 Vertical Industry Domains
Deep expertise across vertical industries, bringing together senior domain experts to deliver high-quality, specialized training data and knowledge services for AI models
Medical Health
Medical Health
Tech & Internet
Tech & Internet
Legal & Compliance
Legal & Compliance
Education & Training
Education
Intelligent Manufacturing
Intelligent Manufacturing
Finance & Investment
Finance & Investment
Pharma R&D
Pharma R&D
Medical Insurance
Medical Insurance
AgriTech
AgriTech
Construction
Construction
E-Commerce
E-Commerce
Logistics
Logistics
New Energy
New Energy
Telecom
Telecom
Culture & Media
Culture & Media
Banking & Insurance
Banking & Insurance
International Trade
International Trade
Academic Research
Academic Research
Government & Public
Government
Environmental
Environmental
Tourism & Hospitality
Tourism & Hospitality
World Model
World Model
Full-Modal AI Training Data Services
Covering text, image, audio, video, 3D point cloud and other full-modal data to provide high-quality training fuel for large models
Text Data
LLM pre-training corpora, instruction fine-tuning data, RLHF human feedback, domain knowledge base construction, Q&A pair generation, text summarization and classification
Image Data
Object detection bounding box annotation, semantic segmentation, instance segmentation, keypoint detection, image classification, OCR text recognition, 3D object recognition training data
Audio Data
Speech transcription annotation, speaker diarization, emotional speech recognition, multilingual speech collection, TTS training data, wake word collection
Video Data
Object tracking annotation, action recognition, spatiotemporal action localization, video segmentation, motion capture, scene understanding, multi-camera fusion annotation
3D Point Cloud Data
3D bounding box annotation, point cloud semantic segmentation, LiDAR data annotation, autonomous driving scene annotation, multi-sensor fusion annotation
Custom Collection
Targeted scenario data collection, industry vertical corpus development, user behavior data collection, multimodal synchronous collection, data-level transaction services
Why Choose Langhui?
We are more than just a data service provider — we are your strategic partner for AI deployment
Domain Expert Driven
7,600+ certified experts across various industries deeply involved to ensure data professionalism and accuracy
Three-Tier Quality Assurance
Self-check + mutual check + expert spot-check, strict quality control system ensures delivery quality
AI-Powered Matching
Intelligent task assignment system, 2-hour rapid response, precisely matching the most suitable experts
Data Security & Compliance
Comprehensive data security system, confidentiality agreement signed, ensuring client data asset security
Delivery Process
Standardized four-step process ensures high-quality delivery for every project
Requirement Analysis & Solution Design
Deep understanding of business requirements, developing annotation specifications, acceptance criteria and implementation plans
Expert Matching & Team Building
AI intelligent matching + manual review, building a dedicated domain expert team
Annotation Execution & Quality Control
Standardized workflow, real-time progress monitoring, multiple rounds of cross-validation
Acceptance & Continuous Optimization
Three-tier quality inspection, format verification, post-delivery technical support and optimization suggestions
Supplier Rating System
200+ certified suppliers, S/A/B/C four-level dynamic rating, ensuring stable and high-quality delivery capability
S-Tier Suppliers
Strategic partners, priority allocation of high-value projects, dedicated account manager full-service
- Monthly delivery capacity 5,000+ tasks
- Quality pass rate 99%+
- Dedicated expert team 50+ people
A-Tier Suppliers
Core partners, undertaking medium and large projects, stable high-quality delivery
- Monthly delivery capacity 2,000+ tasks
- Quality pass rate 97%+
- Dedicated team 20+ people
B-Tier Suppliers
Stable partners, undertaking standardized tasks, continuous growth and improvement
- Monthly delivery capacity 500+ tasks
- Quality pass rate 95%+
- Professional team 10+ people
C-Tier Suppliers
Newly onboarded suppliers, undertaking basic tasks, improving capability system, advancing and growing
- Monthly delivery capacity 100+ tasks
- Quality pass rate 90%+
- Team 5+ people
Two Cooperation Models
Whether you are an industry expert or an annotation team, you can find the right way to cooperate at Langhui
Individual Expert
For industry professionals
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1
Online Application
Submit resume, professional qualifications and domain information
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2
Qualification Review
Professional qualification assessment completed within 3 business days
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3
Training & Certification
Complete platform specification training and obtain certification
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4
Task Acceptance
Intelligent task matching, flexible selection, piece-rate billing
Supplier Partnership
For annotation teams/enterprises
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1
Enterprise Onboarding
Submit enterprise qualifications, team size and performance cases
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2
Capability Assessment
Comprehensive evaluation of team size, technical capability and industry experience
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3
Tiered Credit Rating
S/A/B/C four-level rating, matching corresponding task volumes
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4
Long-Term Cooperation
Sign framework agreement, stable task supply, quarterly rating adjustment
Join Langhui AI Data Ecosystem
Walk side by side with leading AI enterprises, create the intelligent future together
Whether you are a domain expert or an annotation team, you can find value here
Certified Experts
Certified Suppliers
Delivered Projects
Client Satisfaction