Exclusive charmonium production at the electron-ion collider in China Xue Wang, Xu Cao, Aiqiang Guo, Li Gong, Xiao-Shen Kang, Yu-Tie Liang, Jia-Jun Wu and Ya-Ping Xie Eur. Phys. J. C, 84 7 (2024) 684 Published online: 11 July 2024 DOI: 10.1140/epjc/s10052-024-13033-9