Dongni An@da2899MFE Student@Columbia UniversityFollow BadgesProblem Solving Certificationsda2899 has not earned any certificates yet. Work Experienceda2899 has not updated employment details yet.Educationda2899 has not updated education details yet.LinksLinkedinhttps://www.linkedin.com/in/andongni/ Skillsda2899 has not updated skills details yet.