Xi Jinping (L) and U.S. President Barack Obama (R) take a walk before heading into their second meeting, at the Annenberg Retreat, California, the United States, June 8, 2013. Chinese President Xi Jinping and U.S. President Barack Obama held the second meeting here on Saturday to exchange views on economic ties. (Xinhua/Lan Hongguang) " src="http://www.globaltimes.cn/Portals/0/attachment/2011/66d8d85a-6d83-4885-ad84-ba8e68325303.jpg" />

Chinese President Xi Jinping (L) and US President Barack Obama (R) take a walk before heading into their second meeting, at the Annenberg Retreat, California, the United States, June 8, 2013. Chinese President Xi Jinping and US President Barack Obama held the second meeting here on Saturday to exchange views on economic ties. Photo: Xinhua 

Chinese President Xi Jinping (L) talks with US President Barack Obama after their meeting at the Annenberg Retreat, California, the United States, June 7, 2013. Photo: Xinhua 

Chinese President Xi Jinping (L) and US President Barack Obama meet the press after their meeting at the Annenberg Retreat, California, the United States, June 7, 2013. Photo: Xinhua 

Chinese President Xi Jinping is greeted by US President Barack Obama at the Annenberg Retreat, California, the United States, June 7, 2013. Chinese President Xi Jinping and his US counterpart, Barack Obama, met Friday to exchange views on major issues of common concern. Photo: Xinhua 

Chinese President Xi Jinping and his wife Peng Liyuan wave upon their arrival in California, the United States, June 6, 2013. Xi arrived in California Thursday for a meeting with US President Barack Obama. Photo: Xinhua 

Chinese President Xi Jinping, accompanied by Mexican President Enrique Pena Nieto, visits Chichen Itza, an archaeological site of the Maya civilization in the Mexican state of Yucatan, June 6, 2013. Photo: Xinhua 

Chinese President Xi Jinping (2nd L) attends a welcoming ceremony held for him by Mexican President Enrique Pena Nieto (2nd R) in Mexico City, capital of Mexico, June 4, 2013. Photo: Xinhua 

Chinese President Xi Jinping (2nd L, front) and his wife Peng Liyuan (2nd R, front) visit a local farmer's family in Costa Rica, June 3, 2013. Photo: Xinhua 

Chinese President Xi Jinping greets children welcoming him at the entrance of the Costa Rican Legislative Assembly in San Jose, Costa Rica, June 3, 2013. Xi met with Costa Rican Legislative Assembly President Luis Fernando Mendoza and representatives of Costa Rican political parties here on Monday. Photo: Xinhua 

Chinese President Xi Jinping (C) and his wife Peng Liyuan (L) receive the Key to the city of San Jose from San Jose's Mayor Johnny Araya (R) in San Jose, capital of Costa Rica, June 3, 2013. Photo: Xinhua 

Chinese President Xi Jinping (2nd L, front) and his wife Peng Liyuan (1st L, front) pose for a photo together with Costa Rican President Laura Chinchilla (2nd R, front) and her husband Jose Maria Rico (1st R, front) during a welcoming ceremony at the presidential house in San Jose, Costa Rica, June 3, 2013. Xi is on a state visit to Costa Rica. Photo: Xinhua 

Chinese President Xi Jinping (C) and his wife Peng Liyuan (6th R) pose for a group photo with leaders of Caribbean countries prior to a luncheon meeting in Port of Spain, capital of Trinidad and Tobago, June 2, 2013. Photo: Xinhua 

Chinese President Xi Jinping (2nd L) and his wife Peng Liyuan (1st L) pose for a group photo with President of Trinidad and Tobago Anthony Carmona (2nd R) and his wife before the meeting between the two presidents in Port of Spain, Trinidad and Tobago, June 1, 2013. Photo: Xinhua 

Chinese President Xi Jinping and his wife Peng Liyuan arrive in Port of Spain May 31, 2013 to start a state visit to Trinidad and Tobago. Photo: Xinhua