Pu He@hep07960Follow BadgesProblem Solving CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Problem Solving (Advanced)VerifiedskillWork Experiencehep07960 has not updated employment details yet.EducationColumbia University, New YorkLinkshep07960 has not updated links details yet. Skillshep07960 has not updated skills details yet.