Chinese President Hu Jintao (Front, 2nd R) shakes hands with a Chinese diplomat in the United States upon his arrival at New York, the United States, on Sept. 21, 2009. Hu Jintao arrived here Monday for a UN climate change summit and other UN meetings. He will also attend a financial summit of the Group of 20 (G20) in Pittsburgh scheduled for Sept. 24-25. [Xinhua]