Addendum: The study of active geomagnetic shielding coils system for JUNO. (21st December 2021) - Zhang, G.; Lu, H.; Songwadhana, J.; Yan, Y.; Morozov, N.; Ning, F.; Zhang, P.; Yang, C.; Khosonthongkee, K.; Limphirat, A.; Yan, T.; Payupol, T.; et al.