Change your cover photoUpload Change your cover photoUpload Change your cover photo Tonghai Sun This user account status is Approved followers0 following5 Follow About About Posts Posts Comments Comments This user has not added any information to their profile yet.Company / InstitutionThe University of Hong KongCountryHong KongRegistration DateJoined 25.1.2019User LocationKennedy Town, Hong Kong Only fill in if you are not human