Chinese President Xi Jinping (L) and US President Barack Obama take a walk before heading into their second meeting, at the Annenberg Retreat in California of the US, June 8, 2013. Xi Jinping met with Barack Obama for an informal summit in California's Sunnylands on June 7-8, 2013. Later this month, Xi will pay his first state visit to the US since he took office in 2013. Here are four major meetings between Xi and Obama since 2013. (Xinhua/Lan Hongguang)

Chinese President Xi Jinping (R) meets with US President Barack Obama in St. Petersburg, Russia, Sept. 6, 2013. Xi Jinping held talks with Barack Obama on the sidelines of the eighth Group of 20 summit. Later this month, Xi will pay his first state visit to the US since he took office in 2013. Here are four major meetings between Xi and Obama since 2013. (Xinhua/Ju Peng)

Chinese President Xi Jinping (R) meets with US President Barack Obama at the Zhongnanhai leadership compound in Beijing, capital of China, Nov. 11, 2014. Xi Jinping held talks with Barack Obama who was paying a state visit to China after attending the APEC economic leaders' meetings in Beijing. Later this month, Xi will pay his first state visit to the US since he took office in 2013. Here are four major meetings between Xi and Obama since 2013. (Xinhua/Ju Peng)

Chinese President Xi Jinping (R) meets with US President Barack Obama in The Hague, the Netherlands, March 24, 2014. Xi Jinping met with Barack Obama on the sidelines of the Nuclear Security Summit. Later this month, Xi will pay his first state visit to the US since he took office in 2013. Here are four major meetings between Xi and Obama since 2013. (Xinhua/Lan Hongguang)