Papers needed?

Madam, Mister,
I plan to visit Hong Kong for one week (8 days in fact) in June. I am binational, Belgium/Luxemburg. My ID card is belgian, my passport is from Luxemburg. From what I have read, I will need no other paper than those two. Can you confirm this information, or will I need to provide more official papers to land in Hong Kong ?
Thanks in advance.