From left: Kyrgyz President Almazbek Atambayev, Russian President Vladimir Putin, Chinese President Hu Jintao, Kazakhstan's President Nursultan Nazarbayev and Tajik President Enomali Takhmon take part in the ceremony of signing joint papers at an extended format meeting of the Heads of States Council of the Shanghai Cooperation Organization (SCO) in the Great Hall of People, Beijing, 7 June 2012.