The study looked at how Asian currencies moved in relation to the US dollar and the Chinese renminbi over time. They used a method called wavelet analysis to see how important each currency was at different points in time. The researchers found that after the global financial crisis, Asian currencies were less influenced by the US dollar but more influenced by the Chinese renminbi, especially after China changed its exchange rate system in 2015. This suggests that Asian countries are now paying more attention to the renminbi when managing their exchange rates.