1. Need. The purpose of using tin foil is to lock in the moisture of the pork belly and to effectively prevent oil and water from splashing in the food.

2. Pork belly contains fat, and it is easy to produce oil stains during the roasting process, so you can wrap it in tin foil, but you can also bake it directly on the baking sheet, because the meat will be cut when roasting the pork belly. It's very thin and easy to cook, so you don't need to wrap it in tin foil.