Changjun Yang@yangchangjun010Data engineerChinaFollowAboutCurrentShenzhen Smart Education Co.,Ltd BadgesProblem SolvingSql CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Java (Basic)VerifiedskillCertificate: Problem Solving (Intermediate)VerifiedskillCertificate: SQL (Basic)VerifiedskillCertificate: SQL (Intermediate)VerifiedskillCertificate: SQL (Advanced)VerifiedskillWork Experienceyangchangjun010 has not updated employment details yet.Educationyangchangjun010 has not updated education details yet.