John We@qwychzsdcChinaFollowAboutEducationHM BadgesProblem SolvingSqlC language CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Problem Solving (Intermediate)VerifiedskillCertificate: Problem Solving (Advanced)VerifiedskillWork Experienceqwychzsdc has not updated employment details yet.Education