QINGHUA LI@lqh_fegueUnited StatesFollow BadgesProblem SolvingDays of JSDays ofStatistics CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Problem Solving (Intermediate)VerifiedskillCertificate: Problem Solving (Advanced)VerifiedskillWork Experiencelqh_fegue has not updated employment details yet.Educationlqh_fegue has not updated education details yet.