"Product Quality Law" clearly stipulates that the product or its packaging should be qualified proof of product quality inspection, on the one hand, the producers are required to ensure product quality, on the other hand, in order to allow users and consumers to identify the quality of the product.
The certificate of conformity of product quality inspection is the manufacturer to indicate that the product quality of the factory meets the specified technical requirements, by its quality inspection agencies and inspectors qualified and attached to the product or its packaging certificate of conformity, seal of conformity and other qualified identification.