The salted duck belongs to Baishiyi salted duck, which is a famous specialty of Chongqing. This time they have an exhibition in Nanping. You can go and have a look. There are many people buying bacon there, but there is only one store for salted duck. Chongqing Baishiyi Salted Duck Food Co., Ltd. produces authentic Baishiyi Salted Duck. Are you sure about the registered trademark? Nowadays, several companies in Chengkou are making old bacon, but they have to formulate a so-called industry standard. Those that pass the standard are the real Chengkou old bacon.