Optical model development in China: Soukhovitskiĩ’s contributions Sun Weili, Li Rui, Ye Tao, Guo Hairui and Wang Jia Eur. Phys. J. A, 60 6 (2024) 129 Published online: 17 June 2024 DOI: 10.1140/epja/s10050-024-01312-8