The reason why Zhongyu flour has no quality grade is that the flour products do not meet the standards. Zhongyu flour is produced by Shandong Binzhou Zhongyu Food Co., Ltd. It is a famous trademark brand in Shandong Province and has no quality grade. In this case, it is a flour product that does not meet the standards and should be privately made flour. Quality grade The quality grade of flour is not as high as possible. Flour with a higher grade is whiter in color but contains less nutrients. Flour with a low grade is processed roughly and loses less nutrients in the flour. Generally, choose first grade for daily consumption. or second-grade flour.