People ride a specially constructed 'ice-chair' on a frozen lake in front of Drum Tower in Beijing, Jan 18, 2011. [Photo/Agencies]

The cover of a wallet bearing an image of US President Barack Obama's face, in place of the usual image of China's late Chairman Mao Zedong, is pictured at a souvenir shop in Beijing, Jan 18, 2011. Chinese President Hu Jintao concluded his four-day state visit to the United States on Jan 21 during which he and his US counterpart Barack Obama agreed to build a China-US cooperative partnership. [Photo/Agencies]