beijing

A military honor guard prepares for US Chief of Naval Operations Admiral Jonathan Greenert's visit with Commander in Chief of The People's Liberation Army (PLA) Navy Admiral Wu Shengli at a welcoming ceremony at the PLA Navy headquarters outside of Beijing, China, 15 July 2014.  For the first time since 1971 China's navy participated alongside the US navy in Rim of the Pacific naval exercises last week.

Stephen Shaver/EPA

A military honour guard prepares for US chief of naval operations Jonathan Greenert’s visit with commander-in-chief of The People’s Liberation Army (PLA) Wu Shengli at a welcoming ceremony at the PLA navy headquarters outside of Beijing, China

A Chinese woman adjusts the Chinese national flag near U.S. national flags before a Strategic Dialogue expanded meeting that's part of the U.S.-China Strategic and Economic Dialogue at the Diaoyutai State Guesthouse in Beijing, Thursday, July 10, 2014.

Ng Han Guan/AP

The US and Chinese national flags are prepared ahead of a meeting that forms part of the US-China Strategic and Economic Dialogue at Diaoyutai State Guesthouse in Beijing on Thursday.

Visitors walk down a steep section on a restored part of the Great Wall of China, at Mutianyu, north of Beijing on July 4, 2014. The Great Wall, originally built to keep out invaders from the north, stretches thousands of kilometers across northern China, but much of it is in poor condition.

Greg Baker/AFP

Visitors walk down a steep section on a restored part of the Great Wall of China, at Mutianyu, north of Beijing on Friday

Chinese honour guards prepare for the arrival of Myanmar President U Thein Sein and Chinese President Xi Jinping during a welcome ceremony outside the Great Hall of the People in Beijing on June 27,2014. U Thein Sein is on a visit to China from June 27 to 30.

Wang Zhao/AFP

Chinese honour guards prepare for the arrival of Myanmar President U Thein Sein and Chinese President Xi Jinping during a welcome ceremony outside the Great Hall of the People in Beijing

Players battle for the ball during their match at the swamp soccer China tournament in Beijing, June 26, 2014. The 32 teams from across the country participated in the soccer event to celebrate the 2014 World Cup in Brazil.

Kim Kyung-Hoon/Reuters

Players battle for the ball during a match at a swamp soccer tournament in Beijing. A total of 32 teams from across China participated in the event.

TOPSHOTS This picture taken on June 14, ...TOPSHOTS This picture taken on June 14, 2014 shows a man rising a public bicycle through a bicycle-sharing station in Beijing. Beijing is acutely aware of an increasing number of angry protests over environmental concerns in the country, where three decades of rapid and unfettered industrial expansion have taken a heavy toll. Premier Li Keqiang announced in March that Beijing was "declaring war" against pollution.   CHINA OUT   AFP PHOTOAFP/AFP/Getty Images

AFP/Getty

A man rides a bicycle at a bicycle sharing station in Beijing. China is acutely aware of an increasing number of protests over environmental concerns in the country, where three decades of rapid and unfettered industrial expansion have taken a heavy toll. Premier Li Keqiang announced in March that Beijing was “declaring war” against pollution. Read more

A Chinese honour guard prepares for the arrival of Bangladesh Prime Minister Sheikh Hasina  and Chinese Premier Li Keqiang during a welcome ceremony outside the Great Hall of the People in Beijing on June 9,2014. Sheikh Hasina is on a visit to China from June 6 to 11.

Wang Zhao/AFP

A Chinese honour guard prepares for the arrival of Bangladesh Prime Minister Sheikh Hasina and Chinese Premier Li Keqiang outside the Great Hall of the People in Beijing, China on Monday.

A watermelon vendor takes a nap while waiting for customers during a hot day in Beijing June 5, 2014.

Kim Kyung-Hoon/Reuters

A watermelon vendor takes a nap while waiting for customers during a hot day in Beijing

Tiananmem Square Anniversary...BEIJING, CHINA - JUNE 03:  Chinese Paramilitary police stand guard near Tiananmen Square on June 4, 2014 in Beijing, China. Twenty-five years ago on June 4, 1989 Chinese troops cracked down on pro-democracy protesters and in the clashes that followed scores were killed and injured.

Kevin Frayer/Getty Images

Chinese paramilitary police stand guard near Tiananmen Square on Wednesday in Beijing. Twenty-five years ago on this day Chinese troops cracked down on pro-democracy protesters and in the clashes that followed scores were killed and injured.

A man takes a nap on a cushion which is displayed as a promotional event of a fashion brand at a shopping mall in Beijing May 30, 2014. Temperatures in Beijing on Friday reached 37 degrees Celsius (98.6 Fahrenheit) since it hit a record high of around 40 degrees Celsius (104 Fahrenheit) yesterday, the highest since 1951. The Beijing heatwave is expected to continue through the weekend, local media reported.

Kim Kyung-Hoon/Reuters

A man takes a nap on a cushion, displayed as part of a promotional event, at a shopping mall in Beijing. Temperatures in the city on Friday reached 37 degrees centigrade