1, transportation, warehousing and postal services

2. Information transmission, computer services and software industry

3. Wholesale and retail trade

4. Accommodation and catering industry

5. Financial industry

6. Real estate industry

7. Leasing and business services

8, scientific research, technical services and geological exploration industry

9, water conservancy, environment and public facilities management industry

10, residential services and other service industries

1 1 education

12, Health, Social Security and Social Welfare Industry

13, culture, sports and entertainment

14, public management and social organizations

International organizations.

So the majors corresponding to these categories are all related to the service industry.