During Chen's visit in Taipei, he was met with a series of strong protests directed at himself and Ma Ying-jeou, some of which were violent, with Molotov cocktails being thrown by the protesters at riot police. A series of arrests were made after the protests, with a secret letter being sent from the police to a member of the media. Local police reported that 149 of its officers were injured during the opposition protests. Chen referred to Ma simply as "Mr. Ma," not as "President". However, this is consistent with the previous convention in 2008, when KMT ex-politician Lien Chan met Hu Jintao in Peru. Lien did not call the PRC paramount leader Hu Jintao "President," but instead used his title "General Secretary" as the Leader of the Communist Party of China.