Chinese President Hu Jintao (2nd L, front) and his wife Liu Yongqing (1st L, front) are greeted by Kazakh President Nursultan Nazarbayev (1st R, front) upon their arrival in Astana, capital of Kazakhstan, June 12, 2011. Hu Jintao arrived in Astana Sunday for a state visit and an annual summit of the Shanghai Cooperation Organization (SCO).