To make the filling, in a bowl, combine the scallions with salt, white pepper, and sesame oil, then mix well.
To prepare the rice paper, in a bowl, whisk the eggs until smooth. Brush a thin layer of egg on both sides of two rice paper sheets, then overlap them slightly in the center. Let it sit for a few seconds until softened. If it still feels a little stiff, brush on a bit more egg—just enough to soften, not too wet.
To shape the pancakes, sprinkle the scallion filling evenly over the rice paper. Roll it into a log, then gently twist it into a spiral to form a round pancake. Repeat with the remaining rice paper and filling.
To cook the pancakes, in a pan over medium heat, add the cooking oil. Place the pancakes in the pan and cook until golden and crispy on both sides, about 2 minutes per side.
To make the dipping sauce, in a small bowl, mix together the soy sauce, rice vinegar, and chili oil.
To serve, serve the pancakes hot with the dipping sauce on the side.