Gently rub the surface of the fish with the rough side of a clean sponge or the blade of a dull knife to remove the silver layer. Rinse the fish under running water then pat it dry with kitchen paper.
Cut the fish into manageable sections. Then score both sides of each piece with crosswise lines to enhance flavor penetration.
Marinate
In a bowl or tray, mix the fish with scallions, ginger, Shaoxing rice wine, salt, and white pepper. Leave to marinate for 10 minutes.
Discard the aromatics and any liquid appeared during marination. Evenly coat the fish with cornstarch.
Pan-Fry
Heat the oil in a large skillet. Place in the fish pieces. Leave to fry undisturbed over medium heat.
Once the bottom side becomes golden, flip each piece over to brown the other side.
Serve warm with steamed rice, accompanied by other savory dishes. Or, enjoy it at room temperature as a snack.