Xuyang Duan @xuyang-duan Active 7 years ago ActivityProfileSites 0Friends 0Groups 0 PersonalMentionsFavoritesFriendsGroups Show: — Everything — Updates New Sites Posts Comments Friendships New Groups Group Memberships Group Updates Xuyang Duan's profile was updated 7 years, 5 months ago CourseDepartmentFaculty/Staff portfolioProjectStudent portfolio