Pork Cha siu bao

wheat flour 41.0% , pork 15.0% , lard 22.0% , OYSTER SAUCE 11.0% , baking powder 5.5% , potato starch 2.8% , dark soy sauce 1.4% , sugar 0.7% , corn starch 0.3% , BBQ SAUCE 0.2% , Raising agent 0.1% , vegetable oil 0.0% , seed 0.0% , sesame oil 0.0% , Flavour enhancer 0.0% , salt 0.0% , light soy sauce 0.0% , Acidity regulator 0.0% , rice wine 0.0% , pepper 0.0% , FIVE SPICE POWDER 0.0%