Cong Guan@gczhygxzFollow BadgesProblem SolvingSql CertificationsCertificate: Problem Solving (Intermediate)VerifiedskillCertificate: SQL (Basic)VerifiedskillCertificate: SQL (Intermediate)VerifiedskillCertificate: SQL (Advanced)VerifiedskillCertificate: Software EngineerVerifiedroleWork Experiencegczhygxz has not updated employment details yet.EducationUniversity of OxfordLinksgczhygxz has not updated links details yet. Skillsgczhygxz has not updated skills details yet.