Have the visa requirements changed recently?

I'm from holland and hold a dutch passport,I went to hong kong before and didn't need to apply for a visa before entering. My girlfriend is Vietnamese and holds a Vietnamese passport. We live in china, I am here to study, she is on a tourist visa that lasts 6 months at a time. Yesterday we had my birthday party with Vietnamese people and they said Vietnamese people no longer need a visa to enter hong kong (for either 14 or 90 days). I can't find anything on the Internet so came here to ask instead. Thanks