DUAN YINGJIE@yingjieduan1SingaporeFollowAboutEducationPKU BadgesProblem SolvingJavaPythonSql CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Problem Solving (Intermediate)VerifiedskillCertificate: SQL (Basic)VerifiedskillCertificate: SQL (Intermediate)VerifiedskillWork Experienceyingjieduan1 has not updated employment details yet.EducationPKU