Change your cover photoUpload Change your cover photoUpload Change your cover photo WaiChing Sun This user account status is Approved followers0 following0 Follow About About Posts Posts Comments Comments This user has not added any information to their profile yet.Company / InstitutionColumbia UniversityCountryUnited StatesRegistration DateJoined 2.12.2017User LocationNew York, NY, USA Only fill in if you are not human