The first comment on this article:
As a Hong Kong resident, I should point out that this report was a bit over-sensationalised. The police need a warrant from a court in order to require access to a device, and to obtain such a warrant they need to demonstrate a “national security” reason.
I don’t see this situation as being much different in reality from the situation in other countries – the police and border forces of the UK and New Zealand, for example, have very similar powers. And so does the USA for that matter, where as I understand it, the EFF’s advice is only to bring empty or burner devices across the US border
I am not a lawyer & cannot offer a sound legal assessment