Ask Teacher 863211--Parent's GC applicatoin question

Hi Teacher 863211,

I am applying for GC for my dad, and he is in China. We were told that his application had been sent to GuangZhou Embassy from NVC in November, and we haven't heard anything from GuangZhou Embassy yet.
Does my dad have to wait for his priority date to be current? or as a parent of US citizen, his priority is current just as if he were in the US.

Thanks,