GuoZhigang,male,Hannationality,wasborninOctober1954inBeijing.Heobtainedhisbachelor'sdegreeinDepartmentofIndustrialEconomicsandManagementofRenminUniversityofChinain1982;master'sdegreeinDepartmentofSociologyofUniversityofWesternOntarioinCanadain1985;anddoctor'sdegreeinPopulationResearchInstituteofRenminUniversityofChinain1990.Heengagedinteachingandresearchfrom1985to1999inPopulationResearchInstituteofRenminUniversityofChina.Currently,heisprofessoranddoctoraltutorofDepartmentofSociologyofPekingUniversity.