Update README.md

README.md

@@ -9,6 +9,7 @@ Additionally, we have meticulously filtered out low-quality images through manua
 
 For more details, please refer to our paper:
 * [Diffusion-4K: Ultra-High-Resolution Image Synthesis with Latent Diffusion Models](https://arxiv.org/abs/2503.18352) (CVPR 2025)
+* [Ultra-High-Resolution Image Synthesis: Data, Method and Evaluation](https://arxiv.org/abs/2506.01331)
 * Source code is available at [https://github.com/zhang0jhon/diffusion-4k](https://github.com/zhang0jhon/diffusion-4k).