Place the steak in a bowl, add cornstarch, five-spice powder, salt, and pepper. Mix until evenly coated.
Heat the oil in a pot until it reaches 190°C
Carefully place the beef strips in the oil and fry them for about 4 to 5 minutes, until golden brown, and set aside on paper towels.
Prepare the sauce by adding a tablespoon of oil to a pan. Sauté the chili peppers, green onions, and ginger over medium heat for a few minutes. Add garlic and fry for another minute.
Incorporate soy sauce, chili sauce, vinegar, and ketchup until thickened.