Next One:H. Wang, X. Wang, Y. He, Z. Yang, Y. Liu, Q. Guo, R. Zhou, X. Xiao, Z. Huang, and L. Zhang, “New mode-group-permutation strategies for MDL reduction in long-haul MDM systems,” Optical Fiber Communication Conference (OFC) 2023, (IEEE&OSA, March 5-9, 2023, Santiago, CA, USA), paper W3E.7.