Update README.md

README.md

@@ -62,7 +62,8 @@ Yunfan Shao, Zhichao Geng, Yitao Liu, Junqi Dai, Fei Yang, Li Zhe, Hujun Bao, Xi
 **Note: Please use BertTokenizer for the model vocabulary. DO NOT use original BartTokenizer.**
 
 ## Citation
-Shao, Y., Geng, Z., Liu, Y. et al. CPT: a pre-trained unbalanced transformer for both Chinese language understanding and generation. Sci. China Inf. Sci. 67, 152102 (2024). https://doi.org/10.1007/s11432-021-3536-5
+Shao, Y., Geng, Z., Liu, Y. et al. CPT: a pre-trained unbalanced transformer for both Chinese language understanding and generation. Sci. China Inf. Sci. 67, 152102 (2024). 
+https://www.sciengine.com/SCIS/doi/10.1007/s11432-021-3536-5
 
 ```bibtex
 @Article{Shao2024a,