Category I: heads of state organs, party and mass organizations, enterprises and institutions; The second category: professional and technical personnel; The third category: clerks and related personnel; The fourth category: business and service personnel.

occupational classification: agriculture, forestry, animal husbandry and fishery; Manufacturing industry; Warehousing and postal services; Information transmission, computer services and software industry; Wholesale and retail trade; Accommodation and catering industry; Financial industry; Real estate industry; Leasing and business services; Scientific research, technical services and geological exploration; Water conservancy, environment and public facilities management industry; Resident services and other service industries; Education; Health, social security and social welfare industries; Culture, sports and entertainment; Public management, social organization and communication industry.

References:

China Ping An Insurance official website-Occupational Classification Table.