Mix all of the ingredients in the seasoning mix together. Mix all of the gravy ingredients together in another bowl and set aside until the last step. Take the seasoning mix and stir it into the beef slices. Allow to marinate from anything from 20 minutes to overnight.
Add 4 tablespoons cooking oil to a wok or a frying pan and when it is hot, add the seasoned beef and fry until browned. Remove from pan and set aside.
Add another 2 tablespoons of oil and add the onion, garlic and ginger and fry. Add in capsicum and black beans and cook until capsicum is cooked. Then add red chillies, spring onion, Chinese rice wine and return the beef back to the pan. Lastly stir in the gravy mixture.