President Hu Jintao (first right, front) talks with Kazakh President Nursultan Nazarbayev, Kyrgyz President Kurmanbek Bakiyev, Russian President Vladimir Putin, Tajik President Emomali Rakhmonov and Uzbek President Islam Karimov after a tree planting ceremony marking the 5th anniversary of the founding of the Shanghai Cooperation Organization at a hotel in west Shanghai yesterday. [Xinhua]