Yingying Xue @yingying-xue Active 6 years, 5 months ago ActivityProfileSites 0Friends 0Groups 0 PersonalMentionsFavoritesFriendsGroups Show: — Everything — Updates New Sites Posts Comments Friendships New Groups Group Memberships Group Updates Yingying Xue changed their profile picture 6 years, 7 months ago CourseDepartmentFaculty/Staff portfolioProjectStudent portfolio