Skin, shape, flesh texture, the way the flesh sticks to the seed, the shape of the seed, the thickness of the skin all look like Achachairu. They are often double seeded in decent sized fruit. They often have one large seed and one or two smaller aborted or just under developed seeds. Some extra large fruits can have three seeds. Seed isn't quite in the middle. After spooning the flesh out for my 2 year old, I've found o e side in particular has more flesh than the others, which you can't really spoon the flesh off.
Oh, and these are well over ripe. At that stage they become very sweet and some people prefer them that way, but I find I can only eat one or two at that stage...
As for being a Chinese Special? I guess they could have come from China, as they aren't the rarest species, but doubtful they'd be farmed there and shipped to Canada without anyone noticing anywhere else. The Australian farmers have been sending boxes to Canada (and UK and other places) though, and it coincides with the timing of the Australian fruiting season (would be opposite season for China). They likely didn't know what it was and slapped on the old 'Chinese Special' tag on...