Hi Tim. Of course, there's no such species as P. hainanensis...who knows if the animals are even from Hainan. It's been said before, but it's likely that those of us keeping the wierd, currently unidentifiable Paramesotritons are likely going to end up with new species once the taxonomic dust settles.
I've seen the large, bulky animals like the photo you provide here in the states. Not altogether unlike the deloustali photo in National Geographic.