Multi-year polarimetric monitoring of four CHIME-discovered repeating fast radio bursts with FAST

Yi Feng, Yongkun Zhang, Jintao Xie, Yuan-Pei Yang, Yuanhong Qu, D. K. Zhou, Di Li, Bing Zhang, Weiwei Zhu, Wenbin Lu, Jiaying Xu, Chenchen Miao, Shiyan Tian, Pei Wang, Jumei Yao, Ju-Mei Yao, Jiarui Niu, Heng Xu, Jinchen Jiang, D. J. Zhou, Zenan Liu, Chao‐Wei Tsai, Zi-Gao Dai, Xue-Feng Wu, F. Y. Wang, J. L. Han, Kejia Lee, Renxin Xu, Yong-Feng Huang, Yuan-Chuan Zou, Jinhuang Cao, Xianglei Chen, Xianglei Chen, Dongzi Li, Ye Li, Wanjin Lu, Jiawei Luo, Jintao Luo, Rui Luo, Jintao Luo, Bojun Wang, Weiyang Wang, Qin Wu, Mengyao Xue, Di Xiao, Wenfei Yu, J. P. Yuan, Chunfeng Zhang, Junshuo Zhang, Lei Zhang, Songbo Zhang, Ru-Shuang Zhao, Yu‐Hao Zhu, Ru-Shuang Zhao, Yu‐Hao Zhu