CHEN Yifan@ychhhenFollow BadgesProblem SolvingJavaSql CertificationsCertificate: Problem Solving (Basic)VerifiedskillWork Experienceychhhen has not updated employment details yet.Educationychhhen has not updated education details yet.LinksGithubhttps://github.com/ychhhen Skillsychhhen has not updated skills details yet.