鸭货用酱油、冰糖、八角、桂皮、花椒和干辣椒慢火卤制，风干至表皮乌黑油亮。先甜后麻再辣。1997年从武汉一家小店起家，如今已是上市公司。
Founded in 1997 by Zhou Fuhua near Wuhan Railway Station. The secret recipe came from his grandmother. Zhou Hei Ya went public on the Hong Kong Stock Exchange in 2016 with annual revenues exceeding 4 billion yuan.