Legal analysis: Chain stores actually use 35 categories, which can be directly selected: advertising, online advertising on computer network, advertising design, providing advertising space for goods and services on the website, providing commercial information and suggestions for consumers to choose goods and services, commercial intermediary services, promoting others, providing online market and personnel management consultation for buyers and sellers of goods and services, compiling web indexes for commercial or advertising purposes, consulting on business strategies and consulting services, all of which are provided through the website.

Legal basis: Article 2 of the Standardization Law of People's Republic of China (PRC) The standards mentioned in this Law (including standard samples) refer to the technical requirements that need to be unified in agriculture, industry, service industry and social undertakings.

Standards include national standards, industry standards, local standards, group standards and enterprise standards. National standards are divided into mandatory standards and recommended standards, while industry standards and local standards are recommended standards.

Mandatory standards must be implemented. The state encourages the adoption of recommended standards.