Chinese citizen with residence permit of Sweden, and visa for Hong Kong

Hi!
My friend is wondering what exactly is the terms for her to be able to enter Macau for no more than 1 day.
We are in Hong Kong and wanted to take the ferry over to Macau to see it. We only wanted to go over the day. She has a Chinese passport, with a Swedish residence permit, and a visa for a two entry to Hong Kong. We have flight tickets to Beijing for the 21st of August. Does she need a visa for Macau as well? Or is her residence permit enough?

What exactly does she need to be able to enter Macau for no more than, say 12 hours?
Does it help to bring any specific paperwork, like plane tickets to Beijing, or a round trip ticket back to Hong Kong?

Thank you for all your help.

Camilla