Mix the cornflour, eggs, rice wine, salt, Chinese five-spice and freshly ground black pepper in a bowl.
Put the corn starch onto a large flat plate.
Dice chicken thighs into even bite-size pieces and then cover them with batter.
Remove the chicken pieces from the batter and then add them to the plate with corn starch.
Toss the chicken pieces until it is all evenly coated. Do not let the coated batter sit too long before putting them in hot oil or the moisture of the chicken will soak up the cornflour.
Heat ½ cup of oil in a wok. It might take a while until it gets really hot, depending on your pan and stove.
Add the coated chicken pieces to the pan and fry for a few minutes, until lightly browned. Do it in batches to avoid overcrowding the pan.
Stir the chicken pieces to brown the other side, and cook for a further 5 to 6 minutes or until the chicken is cooked through and brown and crispy on the outside.
Remove the chicken pieces from the pan, and set them aside on a piece of kitchen roll to get rid of excess oil. Keep them warm while cooking the vegetables.
Add chilies, red peppers, and garlic to the same wok, add a little oil if needed, and sauté for a minute.
Stir in the spring onions and salt, and cook for another minute.
Add the cooked chicken pieces to the wok, stir well to coat them in the vegetable mix, and cook for a few more minutes.
Remove from heat and serve on a bed of rice or noodles.