In the general discussion, what are these two systems/buffers, and which of these two buffers/systems is suggested by the authors as used differently by the Chinese speakers?

Baddeley, Alan & Xu, Zhan & Ho, Sai & Hitch, Graham. (2023). On verbal memory span in Chinese speakers: Evidence for employment of an articulation-resistant phonological component. Journal of Memory and Language. 129. 104389. 10.1016/j.jml.2022.104389.