Cut the chicken into bite-sized pieces.
In a bowl, mix cornstarch, flour, salt, black pepper, garlic powder, onion powder, and white pepper.
In a separate bowl, whisk the egg and milk together.
Dip the chicken pieces into the egg mixture, then coat them in the flour mixture.
Heat oil in a frying pan over medium-high heat.
Fry the chicken pieces until golden brown and crispy, about 3-4 minutes per side.
Remove the chicken and drain on paper towels.
Garnish with chopped green onions and red chili slices before serving.