13 minutes ago, Tropicalsenior said:It seems to me that the lengthy cooking of it would render out a lot of the fat and that most of the fat would then be in the sauce.
I have eaten (a little of) it. Not all the fat is rendered and the sauce isn't particularly greasy. In fact, I quite liked it.
If you really want to replicate the dish, get the fattiest belly you can find. Chinese pigs are raised to be fatter than those in the west.