Update README.md

Author: Gaojingtong

Diff for: README.md

@@ -1,3 +1,16 @@
-This is the code reference for the main process of **SampleLLM**. The codes merely serve as a process reference and cannot run directly.
+# Introduction
+This is the code reference for the main process of **SampleLLM** accepted by WWW'25 Industry Track. The codes merely serve as a process reference and cannot run directly.
 - data_generation is for the first stage (generating LLM-based samples)
 - sampling is for the second stage (feature attribution-based importance sampling)
+
+# Citation
+If you feel our work is insightful and want to use the code or cite our paper, please add the following citation to your paper references.
+
+```
+@article{gao2025samplellm,
+  title={SampleLLM: Optimizing Tabular Data Synthesis in Recommendations},
+  author={Gao, Jingtong and Du, Zhaocheng and Li, Xiaopeng and Zhao, Xiangyu and Wang, Yichao and Li, Xiangyang and Guo, Huifeng and Tang, Ruiming},
+  journal={arXiv preprint arXiv:2501.16125},
+  year={2025}
+}
+```