The tertiary industry of a product is the last stage from production to contact with the final customer. Because each product has its own unique production chain,
So the tertiary industry has different meanings for different products. The third industry in the production chain of a mobile phone is the logistics, wholesale, distribution and maintenance of the mobile phone, and for a building, its third industry is the real estate agent.
Extended data:
Some special examples, such as education, academic research, scientific research and development, legal profession, medical treatment and other industries, are operational products such as textbooks, teaching tools, experimental tools and medical tools, and are third-level industries such as conceptual products such as constitution, law and scientific theory.
Because the production process of concept products is difficult to determine, the related industries of concept products are sometimes classified as the fourth industry.
In the Classification of National Economic Industries (GB/T 4754-20 17), the tertiary industry is divided into 15 categories, that is, there are 47 categories from F to T, which is the industry with the most classification.
Baidu encyclopedia-tertiary industry