Cut the beef steak into thin slices against the grain. Marinate the beef with soy sauce, sugar, Shao Xing wine, baking soda and corn starch. Mix well and let it sit for 10-15 minutes. Mix all the stir fry sauce ingredients in a small bowl and set it aside. Roughly chop the black beans or you can add in whole.
Heat the wok/pan over medium-high heat, drizzle oil, and add the marinated beef slices. Flatted the beef and let it sear for 2-3 minutes then turn sides and stir fry for another 2-3 minutes. Next, add the onion dices and stir fry for 1 minute. Follow with the bell peppers and stir for few seconds. Remove from pan and set it aside.
In the remaining pan, drizzle a bit more oil. Saute the chopped garlic with medium heat for 1 minute, then follow with the ginger and stir for few seconds. Add the black beans stir fry for 1-2 minutes. Then pour the sauce mixture, stir unil the sauce start to get thick.
Add the fried beef, onions and peppers in. Bring to heat over medium-high heat. Toss well to combine everything evenly for 1-2 minutes.
Remove from heat and transfer to serving plate. Serve while hot with plain rice, egg fried rice or noodles.