Change your cover photoUpload Change your cover photoUpload Change your cover photo Yajun Li This user account status is Approved followers1 following0 Follow About About Posts Posts Comments Comments This user has not added any information to their profile yet.Company / InstitutionChina University of GeosciencesCountryChinaRegistration DateJoined 16.3.2018User LocationBeijing, China Only fill in if you are not human