I would request skhan as OP to remove Artocarpus hypargyraeus (sic.) from topic title, since that is incorrect. Artocarpus is about to undergo a major shakeup thanks to phylogenomic work recently done. A paper dealing with proposed new binomials will be published in January or February. At any rate, both by current systematics and the provisional new one A. hypargyreus is incorrect, since that has long peduncles and is not in cultivation.
What is in cultivation is indeed the real kwai muk (better pinyin would be 'gwaimuk'), but the associated binomial has almost always been mistaken. Its current ID is A. nitidus subsp. lingnanensis, but will probably become A. parvus.