hang tong@hisyatokaku2005Follow BadgesProblem SolvingDays of Code CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Problem Solving (Intermediate)VerifiedskillWork Experiencehisyatokaku2005 has not updated employment details yet.EducationETHZLinkshisyatokaku2005 has not updated links details yet. Skillshisyatokaku2005 has not updated skills details yet.