1. Cut beef into small pieces.
2. Put oyster sauce, dark soy sauce, cornstarch, cooking wine, sugar and cumin powder, pinch evenly with your hands, and marinate for 2 hours.
3. Heat the pan, add 1 tablespoon of oil, and stir-fry the beef over high heat.
4. Stir-fry for about 2-3 minutes to 8 minutes.
5. Fry the onion in another oil pan until soft.
6. My family likes fully cooked onions.
7. Pour in the fried beef and stir-fry well.
8. Just sprinkle with chopped green onion.
9. Fragrant.
