Cut the whole chicken in 4 pcs. You can also use the choice parts of the chicken like the thigh, legs or wings. Cut some slits on the chicken skin and meat.
In a large bowl or basin, combine vinegar, garlic, black peppercorns and salt. Mix until the salt is dissolved.
Add in the chicken and rub the vinegar mixture on the chicken then arrange the chicken in the basin to fit them and well soaked with the marinade.
Marinate the chicken for 1 to 3 hours. If you want to keep it in the fridge or overnight, discard the marinade so it will not become too salty and too sour.
Heat cooking oil in wok or pan, about 3 cups. Fry the chicken for 15 minutes or until golden brown.
Serve with spiced vinegar as dipping sauce. Enjoy!