Guangzhou Siu Yuk: Dermis-Layer Micro-Puncturing and Subcutaneous Lipid-Blistering

A cornerstone of Cantonese Siu Mei rotisserie, Siu Yuk is a multi-stage engineering process designed to transform tough swine hide into a brittle, multi-blistered 'glass skin' (Bingpi) while retaining moisture in the underlying muscle. A five-layered pork belly slab is parboiled for three minutes to coagulate surface proteins. Then, during the critical puncturing phase, thousands of microscopic holes are hammered exclusively into the dermis layer; keeping the needles away from the lean meat prevents internal juices from leaking upward. These micro-punctures act as escape vents for heavy subcutaneous fats. After a 24-hour cold dehydration that turns the skin into parchment, the slab is blasted at a volcanic 230 degrees Celsius. The melting subcutaneous fat erupts through the punctures, deep-frying the skin from within and creating a shatteringly crisp air-blistered lattice.