UER: An Open-Source Toolkit for Pre-training Models Zhe Zhao author Hui Chen author Jinbin Zhang author Xin Zhao author Tao Liu author Wei Lu author Xi Chen author Haotang Deng author Qi Ju author Xiaoyong Du author 2019-11 text Proceedings of the 2019 Conference on Empirical Methods in Natural Language Processing and the 9th International Joint Conference on Natural Language Processing (EMNLP-IJCNLP): System Demonstrations Sebastian Padó editor Ruihong Huang editor Association for Computational Linguistics Hong Kong, China conference publication zhao-etal-2019-uer 10.18653/v1/D19-3041 https://aclanthology.org/D19-3041/ 2019-11 241 246