Add arXiv link to README

README.md

@@ -24,6 +24,7 @@ TransitLM is a dataset for public transit route planning in Chinese urban enviro
 
 - Demo: [https://transit-lm.amap.com/](https://transit-lm.amap.com/)
 - GitHub: [https://github.com/HotTricker/TransitLM](https://github.com/HotTricker/TransitLM)
+- arXiv: [https://arxiv.org/abs/2605.22355](https://arxiv.org/abs/2605.22355)
 - Hugging Face Paper: [https://huggingface.co/papers/2605.22355](https://huggingface.co/papers/2605.22355)
 - ModelScope: [https://modelscope.cn/datasets/GD-ML/TransitLM](https://modelscope.cn/datasets/GD-ML/TransitLM)