Update README.md

README.md

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-license: apache-2.0
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+---
+license: apache-2.0
+---
+Vis-CheBI20 is released for Optical Chemical Structure Understanding (OCSU) task, built on the basis of CheBI-20 molecule description dataset.
+
+For technical details, please refer to [OCSU](https://arxiv.org/pdf/2501.15415). Training and evaluation scripts will be available recently, stay tuned!
+
+If you find our work useful in your research, please consider citing:
+
+```
+@article{fan2025ocsu,
+  title={OCSU: Optical Chemical Structure Understanding for Molecule-centric Scientific Discovery},
+  author={Fan, Siqi and Xie, Yuguang and Cai, Bowen and Xie, Ailin and Liu, Gaochao and Qiao, Mu and Xing, Jie and Nie, Zaiqing},
+  journal={arXiv preprint arXiv:2501.15415},
+  year={2025}
+}
+```