Wipe the wok clean and turn heat to medium. When just starting to get hot, swirl in the remaining cooking oil. Add in the green onion, garlic and ginger and cook for 30 seconds. Take care not to burn these aromatics. Add in the carrots and cabbage. Stir well and turn the heat to medium-high. Stir fry the vegetables for 2 minutes, or until the carrots have softened. Add the cooked chicken back into the wok, stir well. Add in the #razmin_oyster_sauce and toss again. Spread the mixture out on a bak