Director and leading actors and actresses pose for photograph at a news conference for the movie "The Viral Factor." It was held in Beijing on July, 25, 2011. Director Dante Lam and actors Jay Chou, Nicholas Tse and actresses Lin Peng and Bai Bing attended the conference and announced the movie will premiere during the Spring Festival in 2012. It is the first collaboration between Jay Chou and Nicholas Tse, who play a pair of brothers.[Photo/Xinhua]