Slice the steaks into thin strips and place into a small bowl.
Add the cornflour, 5 spice, salt, and pepper. Mix until evenly coated.
Carefully heat the oil in a deep saucepan until it reaches 190°C (375°F).
Carefully place the beef strips into the oil and fry for about 4-5 minutes, until golden brown.
Place on some tissue to soak up the excess oil and set a aside.
Meanwhile, prepare the sauce by adding a tablespoon of oil to a frying pan. Frying the chilies, spring onion, and ginger over a medium heat for a few minutes. Add garlic paste and fry for another minute.
Stir in the soy sauce, sweet chili sauce, red wine vinegar, and tomato ketchup until thick.