Went through the rabbit hole for this and found that China offers to convert countries' debt in USD to CNY with a very low interest. [1]
Just by doing this, Kenya saved 215 millions USD... on a Chinese USD loan. [2]
1: https://www.chathamhouse.org/2026/01/chinas-12-trillion-trad...
2 : https://www.bloomberg.com/news/articles/2025-10-07/kenya-sna...