1. In a large bowl, whisk together the soy sauce and egg white. Add beef and mix well. Heat oil in a large skillet until very hot. Slice green onion in half lengthwise, and cut into 2-inch pieces. Add green onion and chopped white onion to skillet, and stir-fry 3 minutes.
2. Add beef, reserving soy mixture, and stir-fry 4 minutes or until no longer red. Add oyster sauce, sugar, and white pepper to soy mixture, stir well and add to skillet. Stir-fry 2 minutes.