Now that President Biden has particularly raised the instances of Michael Kovrig and Michael Spavor:

There’s some hypothesis out of China that President Xi could launch the pair as a goodwill gesture, citing ‘humanitarian grounds’ as his cause

Not doing so dangers additional harm to the US-China relationship that’s already off to a lower than spectacular begin with the brand new US administration. 

In a roundabout way of relevance to FX (maybe extra to AUD than the rest – China has been kicking Australia as a proxy for the US) however it does converse prime US-China strains.