Pork Char Siu is a type of pork, usually in thin, not too thick or thin slices, with a slight amount of marbling. It has a tender and delicious quality that can vary depending on the recipe. The shape of the pork can differ, with some pieces being round, while others are rectangular. Typically, it's made from different parts of the pig, such as the shoulder, belly, or hip, depending on the specific recipe. This preparation allows the pork to absorb the flavors of the soup and noodles it's paired with to the fullest.