Non-standard products refer to products that cannot be standardized and classified, such as clothes and shoes. Standard products refer to standardized products, which can have clear models, such as notebooks, mobile phones, electrical appliances, beauty products and so on.

Non-standard products in a broad sense refer to products or equipment that are not manufactured according to the unified industry standards and norms promulgated by the state, but are designed and manufactured according to their own needs. And the appearance or performance is not in the national equipment product catalogue. In order to meet the needs of large-scale industrial production, the mechanical equipment that has been produced and proved to have good performance after use is shaped and serialized, which is called standard product. According to user's requirements, on the basis of standard products, products produced, modified or customized are called non-standard products.