The thick layer of white fat under a pig's skin, mostly from the back, sold in slabs with little or no lean. It is rendered into lard, or diced into sausages and minced fillings to keep them moist.
The Mosuo people salt an entire pig into zhubiao preserved pork.
Tips
culture
Among the Mosuo and Yi peoples around Lugu Lake, a whole boned pig is salted and sewn shut to cure for years; the finished 猪膘 can be stored for decades as a dowry asset.