Step 1 Prep Everything First: Whisk the soy sauce, sesame oil, oyster sauce, and sugar in a small bowl. Toss the diced chicken with soy sauce, cornstarch, oil, salt, and white pepper. Break up the cold rice with your fingers so no clumps remain — clumped rice steams instead of fries.
Step 2 Scramble the Eggs: Heat a wok or large skillet over high heat until it just starts to smoke. Add 1 tablespoon of oil and swirl to coat. Pour in the beaten eggs and let them set for 20-30 seconds, then scramble quickly into soft ribbons. Remove to a plate.
Step 3 Sear the Chicken: Add another tablespoon of oil to the hot wok. Spread the chicken in a single layer and let it sear undisturbed for 2 minutes until golden, then toss and cook 2 more minutes until cooked through (165°F/74°C internal temperature). Remove to the plate with the eggs.
Step 4 Fry the Rice: Add the remaining tablespoon of oil. Add the green onion whites, garlic, and ginger; stir-fry 30 seconds until fragrant. Add the cold rice and spread it into an even layer — let it sit untouched for 1-2 minutes so the bottom grains get lightly crisp and golden. Toss and repeat once more.
Step 5 Sauce and Toss: Pour the sauce mixture over the rice and toss everything well so each grain is coated. Add the peas and carrots and cook 1-2 minutes until heated through.
Step 6 Bring It Together: Return the chicken and scrambled egg to the wok along with the green onion greens. Toss for 1 minute until everything is steaming hot and combined. Taste and adjust — a splash more soy sauce if it needs salt, another drop of sesame oil for aroma.
Step 7 Serve Hot: Spoon into bowls immediately, topped with extra sliced green onions.