beijing

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

Chinese commuters line-up for a security check at a subway station on May 29, 2014 in Beijing, China. Authorities have increased security in various public locations after an attack left 31 dead in the restive Xinjiang Province last week.

Kevin Frayer/Getty Images

Chinese commuters line up for a security check at a subway station on Thursday in Beijing. Authorities in China have increased security in public locations after an attack left 31 dead in the restive Xinjiang province last week

Chinese trishaw drivers take nap while waiting for customers at a hutong alley near the drum tower, a tourist spot in Beijing, China Wednesday, May 7, 2014.

Andy Wong/AP

Trishaw drivers take a nap while waiting for customers at a hutong alley near the Drum Tower, a tourist spot in Beijing, China