To marinate the pork, use a fork to poke small holes all over the pork belly slices. In a bowl, combine the pork belly with the soy sauce, the oyster sauce, and the rice wine. Mix well and set aside while preparing the batter.
To make the batter, in a bowl, whisk together the cornstarch, the baking soda, the baking powder, the egg, the cooking oil, and the water until smooth.
To coat the pork, add the marinated pork belly to the batter and mix until evenly coated.
To fry, in a pan over high heat, heat the cooking oil to about 350°F (175°C). Fry the pork belly about 2 minutes per side until golden and crisp. Internal temperature should reach 145°F or higher. Remove and drain.
To finish, slice into bite-sized pieces and sprinkle with the salt, the white pepper, and the paprika while hot. Serve immediately.