For the meatballs:
Put the ground beef, rice wine, garlic, spring onions, egg, ginger, soy sauce, sesame oil, cornstarch, salt, and white pepper into a large bowl to combine, stirring in the same direction.
Using wet hands, scoop a large mound of the ground meat mixture, and mold it into a ball. The size should be a little larger than a golf ball. Transfer the meatball to a plate and repeat with the remaining mixture.