Visa for HK and Macau..multiple entry

I need to understand the following:
As a Vietnamese visiting HK and wanting to visit Macau for a one (1) night trip, do I need:

1. Do I need a multiple entry visa for HK?

I know I need visas for HK and Macau... But is there such a thing as a multiple entry visa as I will be visiting HK, then going over to Macau for a one (1) night stay, then back to HK for my flight out.. Does this mean I need a multiple entry visa for HK???

Thanks in advance
Alex

Hi
Yes you need a double-entry visa.

Thank you.:)