Stewed Pork Trotter and Ginger in Sweet Vinegar 祛風補身豬腳薑醋

Ginger, pork feet, egg , salt, sweet vinegar(white sugar, glutinous rice vinegar (water, glutinous rice), caramel color, ginger, tangerine peel, cloves) ; black rice vinegar(rice vinegar, caramel colour (E150a), spices, glutinous rice, salt) ; rock sugar