yang feng@yang_fengFollow BadgesProblem Solving CertificationsCertificate: Problem Solving (Basic)VerifiedskillWork Experienceyang_feng has not updated employment details yet.EducationInstitut National des Sciences Appliquées de LyonLinksLinkedinhttps://www.linkedin.com/in/yfeng1 Skillsyang_feng has not updated skills details yet.