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README.md

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 ## 🌐 About OpenDataArena
 
-**[OpenDataArena (ODA)](https://opendataarena.github.io)** is an open research initiative devoted to evaluating, benchmarking, and creating high-value datasets for the post-training era of large language models (LLMs).  
+**[OpenDataArena (ODA)](https://arena.opendatalab.org.cn/)** is an open research initiative devoted to evaluating, benchmarking, and creating high-value datasets for the post-training era of large language models (LLMs).  
 We believe **data quality defines model capability** — and that **open, reproducible evaluation** is key to accelerating progress in AI.
 
 ### 🚀 Our Mission  
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 ### 🔑 Key Features
 
-- 🏆 **Dataset Leaderboard** — [Leaderboard](https://opendataarena.github.io/leaderboard.html) ranks the most valuable datasets across multiple domains, based on diverse benchmarks.  
+- 🏆 **Dataset Leaderboard** — [Leaderboard](https://arena.opendatalab.org.cn/leaderboard.html) ranks the most valuable datasets across multiple domains, based on diverse benchmarks.  
 - 📊 **Comprehensive Scoring System** — [Scoring tool](https://github.com/OpenDataArena/OpenDataArena-Tool/tree/main/data_scorer) measures dataset quality, diversity, and learning values using reproducible pipelines.  
 - 🧰 **Open-Source Toolkit** — [OpenDataArena-Tool](https://github.com/OpenDataArena/OpenDataArena-Tool) enables dataset evaluation, scoring with a standardized, community-driven workflow.  
 - 🌱 **High-Value Data Generation** — beyond evaluation, ODA continuously produces and shares new, top-quality datasets for fine-tuning and alignment research.
 
 
-If you find our work helpful, please consider ⭐ **starring** and **subscribing** to support open, data-driven AI research. Learn more at [opendataarena.github.io](https://opendataarena.github.io).
+If you find our work helpful, please consider ⭐ **starring** and **subscribing** to support open, data-driven AI research. Learn more at [OpenDataArena](https://arena.opendatalab.org.cn/).
 
 (OpenDataArena is part of [OpenDataLab](https://huggingface.co/opendatalab)).