Cut chicken into thin strips or bite-sized pieces. Add the chicken to a bowl and all the ingredients mentioned above to marinate. Mix well by adding 1 or 2 tablespoon of water. Keep aside until oil is heated for deep frying.
Heat enough oil for deep frying. Once the oil is hot, fry all the chicken pieces until they turn into golden brown colour. keep aside.
Bring 1 to 1.5 litres of water to boiling, add the noodles, salt and oil. Cook the noodles as per instructions on the package.
When done, drain the noodles into a colander immediately and rinse with cold water to prevent further cooking.
Now heat a wok with oil, add chopped garlic and saute for few minutes. Then add carrot, green beans, bell peppers and fry on high flame for few minutes.
After that add dark soya sauce, green chilli sauce and saute well. Now add the fried chicken pieces and combine well.
Then add the cooked noodles, red chilli sauce, black pepper powder, white pepper powder and white vinegar and saute well without breaking the noodles.
Finally, add the chopped spring onions and toss well. Serve the noodles hot!