Sanwu food generally refers to products without production date, quality certificate, manufacturer and unknown origin. Another way of saying this is that Sanwu products are products without manufacturer name, production site and production hygiene license code.

Generally speaking, the law stipulates that there must be Chinese factory name, Chinese factory address, telephone number, license number, product logo, production date, Chinese product description, and if necessary, limited qualitative or suggestive explanation, etc. If the relevant products are produced by the manufacturer and enter circulation or the merchants are selling, they can report to the relevant departments such as the market supervision and administration bureau. If consumers have purchased such products, they can demand triple compensation according to the law.