Administrative detentions can be longer. On paper they can hold you about a month, but it can be longer than that with a judge’s signoff if they have proof of a crime.

And in the US, jail can be up to just short of a year.

This is typically where the police try to get you to confess to something and drag it out as long and uncomfortably as possible until you do, after which you either get to go free (though you end up on a list for a long time) or you may go to a “black jail”/黑監獄 which is a sort of under-the-table prison.

The terms of release can also sometimes require completion of a rehabilitation program, which is often the voluntary alternative to prison, or getting transferred to a short stay detention center for a few months to perform community service.

So pretty similar to the US.