Seasoning 
Light Soy Sauce   1 tbsp
Dark Soy Sauce  1 tbsp
Sugar   1/2  tbsp
Corn flour   1 tbsp
Water   1 tbsp
Oil    1 tbsp

Sauce
Corn flour   1/2  tbsp
Salt   1/8 tbsp
Sugar   2 tbsp
Katchup   2 tbsp
White Vinegar
Water   5 tbsp
 
   

Steps
1)  Shred the chicken into small and long pieces, marinate with seasoning
2)  Shred green & red pepper, mango and spring onion in short stalks
3)  Heat the wok with oil, chopped garlic, add the chicken shred
4)  Stir fry the chicken shred until cooked, dish up
5)  Heat wok again, add oil and stir fry green & red pepper
6)  Add the cooked chicken, add sauce, stir and mix well
7)  Add the mango, spring onion, stir well, then dish up

Remark 
tbsp -     table spoon
If you don't like Mango, you can instead it by Pineapple