shizhongyang @shizhongyang Active 8 years, 7 months ago ActivityProfileSites 0Friends 0Groups 0 PersonalMentionsFavoritesFriendsGroups Show: — Everything — Updates New Sites Posts Comments Friendships New Groups Group Memberships Group Updates shizhongyang changed their profile picture 8 years, 7 months ago CourseDepartmentFaculty/Staff portfolioProjectStudent portfolio