Junior high school and below = 1; senior high school or college degree = 2; higher vocational college = 3; bachelor’s degree = 4; master’s degree and above = 5
Occupational background
Administrative and public institution = 1; enterprises (managerial level) = 2; ordinary company staffs = 3; peasants = 4; freelancers = 5; students = 6; the emeritus and retired = 7