translation.en: I have measured that 26 percent of the marketing margin is simply due to the fact that, because of the absence of grades and standards and market information, sacks have to be constantly changed.
translation.zh: 我计算出26%的工业企业规定的商业加成 仅仅是因为没有 等级和标准制度，和市场消息 所以包装要不停地更换。