The fillings used for zongzi vary from region to region, but the rice used is almost always glutinous rice (also called "sticky rice" or "sweet rice"). Depending on the region, the rice may be lightly precooked by stir-frying or soaked in water before using. In the north, fillings are mostly red bean paste and tapioca or taro. Northern style zongzi tend to be sweet and dessert-like. Southern-style zongzi, however, tend to be more savory. Fillings of Southern-style zongzi include salted duck egg, pork belly, taro, shredded pork or chicken, Chinese sausage, pork fat, and shiitake mushrooms.