Firstly, Combine the chicken stock, 'AMOCAN' Golden Label Soy Sauce(Dark), shao hsing wine, garlic, rice vinegar, brown sugar, ginger root, orange zest, black pepper, star anise and cayenne in a measuring cup. Mix well.
In a 3-quart slow cooker, place the chicken thighs and pour the sauce over. Cook on High for 2-1/2 hours, or on low for 5 hours, until the chicken is falling-apart tender.
Thirdly, remove the chicken from the cooker and strain the liquid into a small saucepan. Bring to the boil.
Next, whisk in the arrowroot mixture, reduce heat to medium, and cook until the sauce thickens to a deep brown lacquer.
Lastly, pour it over the chicken, and serve over rice.