Update README.md

README.md

@@ -33,6 +33,7 @@ PPM is a binary image format. If you need PNG format, we provide conversion code
 I have full parameter information for each trajectory. If you need other parameter information, such as IMU, detailed drone parameters, etc., you can contact me by email at any time.
 
 ## Cite
+U2UData-2[1]
 @inproceedings{feng2025u2udata2scalableswarmuavs,
 title={U2UData-2: A Scalable Swarm UAVs Autonomous Flight Dataset for Long-horizon Tasks}, 
 author={Tongtong Feng and Xin Wang and Feilin Han and Leping Zhang and Wenwu Zhu},
@@ -41,4 +42,6 @@ url={https://arxiv.org/abs/2509.00055}
 }
 
 ## Web Link
-https://fengtt42.github.io/U2UData-2/
+https://fengtt42.github.io/U2UData-2/
+
+[1]:https://arxiv.org/abs/2509.00055