QB is the code for enterprises to implement high-quality production standards, which is different from GB, which is a national standard and is commonly used throughout the country; QB is a standard certified by the enterprise itself by the quality certification body, which is used to standardize the quality management behavior, production process quality management and so on in the enterprise! But it is only valid within the enterprise. People who know clothes generally think that the quality and production of such clothes are better! This is why there are many clothes produced by enterprises with good quality, high price and big brands with QB! If adopted, please praise it, and China Mobile No.1 Team will give you the most satisfactory answer.