Ning Dai2 papers on this site (2019–2020)Pre-trained Models for Natural Language Processing: A SurveyXipeng Qiu, Tianxiang Sun, Yige Xu, et al.2020Style Transformer: Unpaired Text Style Transfer without Disentangled Latent RepresentationNing Dai, Jianze Liang, Xipeng Qiu, et al.2019