System Report for CCL23-Eval Task 6: A Method For Telecom Network Fraud Case Classification Based on Two-stage Training Framework and Within-task Pretraining Guangyu Zheng author Tingting He author Zhenyu Wang author Haochang Wang author 2023-08 text eng Proceedings of the 22nd Chinese National Conference on Computational Linguistics (Volume 3: Evaluations) Maosong Sun editor Bing Qin editor Xipeng Qiu editor Jing Jiang editor Xianpei Han editor Chinese Information Processing Society of China Harbin, China conference publication zheng-etal-2023-system https://aclanthology.org/2023.ccl-3.23/ 2023-08 206 212