Gai Jai Beng (Cantonese Chicken Biscuits)

Prepare the filling: In a bowl, combine diced fatty pork, candied winter melon, toasted sesame seeds, roasted peanuts, minced garlic, five-spice powder, white pepper powder, oyster sauce, granulated sugar (for filling), light soy sauce, Shaoxing wine, and all-purpose flour (for binding filling). Mix well until all ingredients are evenly distributed.