Legal analysis: Commodity bar code is a means to identify commodities composed of bars, spaces and corresponding characters. A trademark is a sign made up of words, figures and their combinations, which is used to identify the producer or operator of a commodity. The purpose of use is different. Bar codes are mainly used to facilitate the automatic sales management of stores. Trademarks are mainly used to facilitate consumers to buy goods.

legal basis: article 8 of the law of the people's Republic of China on the protection of consumers' rights and interests, consumers have the right to know the true situation of the goods they buy or use or the services they receive. Consumers have the right to request business operators to provide information about the price, place of origin, producer, use, performance, specifications, grade, main ingredients, production date, expiration date, inspection certificate, instruction manual, after-sales service or the content, specifications and expenses of the service according to the different conditions of the goods or services.