Complex sentence: In 2010, sponsorship of the competition moved to Ferrostaal, who had signed a representative deal with Manchester City, however the 2012 edition again changed sponsors, this time to Chinese sports company "Winoly".
Split into simpler sentences: In 2010, sponsorship of the competition moved to Ferrostaal, who had signed a representative deal with Manchester City. In 2012, the tournament again changed sponsors, this time to Chinese sports company "Winoly".