2Marinate the beef with Shaoxing wine, soy sauce, cornstarch, salt, and a little oil.
3Mix well and let it sit.
4Chop bell peppers and onions into petals.
5Finely mince ginger.
6Finely mince garlic.
7Combine beef stock, light soy sauce, dark soy sauce, oyster sauce, ketchup, sugar, MSG, black pepper, Sichuan peppercorn powder, white pepper, and cornstarch for the sauce.
8Whisk the sauce ingredients together.
9In a wok with a little oil, sear the beef on all sides for a few minutes.
10Set the beef aside.
11Sauté the garlic, ginger, and vegetables in the same wok.
12Once the vegetables are slightly translucent, add back the beef.
13Pour the prepared sauce over the beef and vegetables.