More than 60%. According to official website, who inquired the Food Safety Supervision Bureau, the profit of joining salted duck is above 60%. Salted duck is mainly made of duck meat and sauce. By killing ducks, unhairing, rubbing salt, re-salting, igniting with straw, scattering chaff shells, dispersing the smoke generated by initial burning, and repeatedly smoking and drying ducks until they are golden yellow.