The quality of mutton roll fat beef sold in Xinfadi, Beijing is not very good. Inquiring about CCTV, I learned that some media reported that a mutton roll sold by a merchant in Xinfadi market was found to contain duck meat, and the situation was true after investigation by the Industrial and Commercial Bureau. Therefore, the quality of mutton roll fat beef sold in Beijing Xinfadi is not very good. Xinfadi, Fengtai District, Beijing is a brand-name commodity wholesale market. Located in Fengtai District, Beijing, the main business entities are Beijing Xinfadi Agricultural Products Center Wholesale Market and Beijing Xinfadi International Aquatic City.