It really is very hard to know what to make of these.  They come from PR China, not Hong Kong, and were issued in 2015 by China Post with pre-printed postage.  The scan shows the fronts of five and reverse of one card.  Now, the lead card in the scan–the one saying “HongKongHomes,” is not showing a picture of Hong Kong.  Some cards have Hong Kong contact numbers; some have PR China numbers; and some have none at all.  Very odd.  We have six of these sets available, all unused.  Grades: 1