Guangdong flavor source red Zhejiang vinegar is good. Roasted duck, also known as Cantonese roast duck, is a traditional famous dish, belonging to Cantonese cuisine, and is made from whole duck barbecue. The color of the dish is golden red, the duck is full, and the belly contains marinade, and the taste is mellow. It is good to use Guangdong flavor source red Zhejiang vinegar to cook roast duck, which can enhance fragrance and taste. The earliest roast duck restaurant in Beijing is Jinling "Old Cheap Square". According to relevant records, Beijing Cheap Square roast duck restaurant opened in the 14th year of Yongle in Ming Dynasty (14 16).