Massage chicken pieces with 1/2 tsp salt (to remove any unpleasant smell) and wash under cold running water and pat dry.
If using bone in chicken legs, cut thigh meat (not skin side)in several areas to make leg sections lay flatter. Using the dull side of knife, pound slightly to flatten more. If using boneless chicken thighs, pound lightly to flatten for quick frying.
Combine marinade/coating mixture thoroughly in a large bowl and marinate chicken for 30 minutes. Because this coating is thick, it is best to use your hand to coat the chicken pieces. In Asia, we call these types of coating marinades as simply marinades since it does impart taste to the food being marinated.
While chicken is marinating, make vinegar sauce by combining all sauce ingredients and set aside.
Make relish by combining all relish ingredients and set aside.
With ample oil (about 1 inch in depth) in a wok or deep fryer, heat oil to medium high. Fry chicken turning them occasionally and adjust heat for even frying. They are done when nicely browned and crunchy, and no longer red in the center. This takes approximately 30-40 minutes for bone-in leg sections and about 15-20 minutes for boneless thigh sections. Timing will depend on how high the temperature is.
Remove and cut in bite size pieces using a cleaver for bone in chicken or cut in bite size pieces using a regular kitchen knife for boneless chicken. Usually one leg section will yield 4 to 5 cut sections. Arrange on large platter and drizzle vinegar sauce over the chicken pieces and arrange a mound of relish on top.