So what, exactly, is it? Does it create a virtual PO box address that gets routed to my post office of choice?
But how do I know the item in China gets shipped in a way that it gets into Canada Post's hands?
Try asking a Chinese vendor on Aliexpress if they can ship to a Canadian PO box, it's like talking to a customer service chatbot, the replies make no sense.
Just have it shipped to your post office itself, that's what I did when I ordered off AliExpress. I think I used FlexDelivery for that. It wa a number of years ago so i don't fully remember but I believe it was flex delivery.