 The team problem was about correspondences between Mandarin and Cantonese (Sinitic) using the fanqie system.IOL 7 was held from July 26 to 31, 2009, at the University of Wrocław, Wrocław, Poland.Chaired by Michał Śliwiński, it received 23 teams from 17 countries, with Australia, United Kingdom, India and Ireland sending teams for the first time.