Cheerleaders perform at the China Open tennis tournament in Beijing, on October 6, 2013. (Photo by Kim Kyung-Hoon/Reuters)

A man takes pictures near a dead pig served as an offering during a festival in celebration of fishermen to the sea in Yantai, Shandong province, China. (Photo by Reuters/Stringer)

A Tibetan mastiff dog is displayed for sale at a mastiff show in Baoding, Hebei province, south of Beijing on March 9, 2013. Fetching prices up to around 750,000 USD, mastiffs have become a prized status-symbol amongst China's wealthy, with rich buyers across the country sending prices skyrocketing. Owners say the mastiffs, descendents of dogs used for hunting by nomadic tribes in central Asia and Tibet are fiercely loyal and protective. Breeders still travel to the Himalayan plateau to collect young puppies, although many are unable to adjust to the low altitudes and die during the journey. (Photo by Ed Jones/AFP Photo)

A security guard stands before a floral display on Tiananmen Square in Beijing on November 1, 2012. The Communist Party's Central Committee convened behind closed doors, state media said, with 500 senior members brought together ahead of a congress which will open on November 8 to usher in leaders for the next decade. (Photo by Ed Jones/AFP Photo)

A tourist with a protective mask takes her self portrait at the Bund under heavy haze in Shanghai, China, Friday, December 6, 2013. Shanghai authorities ordered schoolchildren indoors and halted all construction Friday as China's financial hub suffered one its worst bouts of air pollution, bringing visibility down to a few dozen meters and obscuring the city's spectacular skyline. (Photo by Eugene Hoshiko/AP Photo)

Members of the Special Weapons and Tactics (SWAT) police force take part in a drill in Haikou, capital of south China's Hainan Province, December 15, 2012. (Photo by Xinhua/Zhang Shanyu)

Students stretch during a training session at a gymnastic course at Shenyang Sports School in Shenyang, Liaoning province May 9, 2012. Some 60 students, between the ages of 6 to 15, undergo a nine-year gymnastic programme which includes foundation courses and gymnastic training courses at Shenyang Sports School, and those who are outstanding may be selected to join the national team, according to local media. (Photo by Reuters/Stringer)

Pan Xiaoting of China competes during the first day match against Jennifer Barretta of the United States at the 2013 Amway eSpring Women's World 9-Ball Open in Taipei, southeast China's Taiwan, March 14, 2013. (Photo by Xie Xiudong/Xinhua)

Harvested corn dries on the ground as a girl runs past in a village near Gaomi, in eastern China's Shandong province on October 13, 2012. China is the world's second-biggest corn producer, with output set to increase 3.7 percent this year from 2011, according to the US Department of Agriculture (USDA). (Photo by Ed Jones/AFP Photo)

Chinese students wave flowers and national flags as female astronaut Wang Yaping leaves the Jiuquan satellite launch center for the launch site, near Jiuquan in western China's Gansu province, Tuesday, June 11, 2013. (Photo by Andy Wong/AP Photo)

Chinese actress Fan Bingbing's dress was flying up as she attended the press conference of Jackie Chan's film “Skiptrace” standing by the sea in Cannes, southern France, May 17, 2013. (Photo by Ent.sina.com.cn)

In a photo taken on September 15, 2013, amateur “body fitness” competitors from China pose on stage during a bodybuilding contest in Zhengzhou, Henan province. More than 20 professionals – including a dozen from China – were competing in the Bodybuilding Grand Prix in the central Chinese city for a top prize worth 80,000 yuan (13,000 USD). They were joined by scores of amateurs from across the country, in what event organisers said was a sign of the increasing popularity of muscle building in China. Bodybuilding has at least a century of history in China, but fell out of favor following the Communist revolution in 1949, when competitions were sometimes banned and the sport condemned as western and bourgeois. But it has since enjoyed a resurgence and competitors say the growing number of competitions are boosting the ranks of local professionals. (Photo by Ed Jones/AFP Photo)

In a photo taken on May 19, 2012 a couple wait for a high speed train at a station in Qinhuangdao. A slew of bleak data has raised fears China's economy is cooling faster than previously thought, but analysts say Beijing has only limited means to prevent a politically damaging slowdown. (Photo by Ed Jones/AFP Photo)

A woman walks on the flooded street from a heavy thunderstorm in Shanghai, China, Friday, September 13, 2013. Sudden and heavy thunderstorm hit the city in the afternoon Shanghai and caused the flood with rain water over many streets. (Photo by Eugene Hoshiko/AP Photo)

A balloon-seller cycles along a street during wet weather in Beijing on June 7, 2013. (Photo by Ed Jones/AFP Photo)

Chienese top model Mari Li Yingzhi performs during the 2012 Beijing International Automotive Exhibition at China International Exhibition Center on April 20, 2012 in Beijing, China. (Photo by Reuters/Stringer)

This picture taken on December 7, 2013 shows a model wearing a surgical mask as she parades a collection of gold jewelleries at a park in Nanjing, east China's Jiangsu province. Cities across China have been hit by intense air pollution especially in winter months, much of it caused by emissions from coal-burning power stations, with PM 2.5 levels reaching as high as 40 times WHO limits, while the country's rapid urbanisation, dramatic economic development and climatic factors, further worsen the condition. (Photo by AFP Photo)

A man wearing face mask stands before a wall inside the Forbidden City during heavy pollution in Beijing on February 28, 2013. Beijing residents were urged to stay indoors as pollution levels soared before a sandstorm brought further misery to China's capital. (Photo by Ed Jones/AFP Photo)

A visitor stands near “Charging Bull” statue in Shanghai, China, Monday, July 22, 2013. (Photo by Eugene Hoshiko/AP Photo)

Chinese hostesses jump before the opening session of the Chinese Communist Party's five-yearly Congress at the Great Hall of the People in Beijing on November 9, 2012. The week-long congress, held every five years, will end with a transition of power to Vice President Xi Jinping, who will govern for the coming decade amid growing pressure for reform of the communist regime's iron-clad grip on power. (Photo by Mark Ralston/AFP Photo)

A Chinese paramilitary policeman reacts outside the opening session of the Chinese Communist Party's five-yearly Congress at the Great Hall of the People in Beijing on November 8, 2012. The week-long congress, held every five years, will end with a transition of power to Vice President Xi Jinping, who will govern for the coming decade amid growing pressure for reform of the communist regime's iron-clad grip on power. (Photo by Mark Ralston/AFP Photo)

Students throw their caps in the air as friends take photos following a graduation ceremony at the private Kade College Capital Normal University on the outskirts of Beijing on June 26, 2013. Despite a boom in student numbers in recent years, many graduates from second and third-tier institutions face considerable employment uncertainty in an economy largely fuelled by a blue-collar workforce. (Photo by Ed Jones/AFP Photo)

This photo taken on February 4, 2014 shows young members of the Miao minority group carrying replica guns in Biasha Village, Guizhou Province. The armaments in Biasha, a village tucked amid the wooded peaks of Guizhou province, are a reminder of an era of conflict between Beijing and the mountain tribes who still inhabit swathes of China's southwest. (Photo by Mark Ralston/AFP Photo)

Visitors take photos of classic cars participating in the Peking-to-Paris Motor Challenge, one of the world's longest and toughest classic car rallies, one day before its kick-off in Beijing May 27, 2013. The 96 classic and vintage cars from 26 countries was off from the Great Wall of China on Tuesday to drive a 12,500 km route from Beijing to Paris for 33 days. (Photo by Kim Kyung-Hoon/Reuters)

A traffic policeman signals to drivers during a smoggy day in Harbin, Heilongjiang province, October 21, 2013. The second day of heavy smog with a PM 2.5 index has forced the closure of schools and highways, exceeding 500 micrograms per cubic meter on Monday morning in downtown Harbin, according to Xinhua News Agency. (Photo by Reuters/China Daily)

Women wearing face masks run to cross a street in Beijing May 6, 2013. The United States Embassy monitor on air quality in China classified the quality of air in Beijing as “hazardous”. (Photo by Kim Kyung-Hoon/Reuters)

A recyclable materials collector stands in front of her overloaded tricycle on a main street in central Beijing March 12, 2010. (Photo by David Gray/Reuters)

Young visitors speak to each other at Yuyuan Garden, one of the most famous tourist destinations in Shanghai, China, Thursday, May 30, 2013. (Photo by Eugene Hoshiko/AP Photo)

An elderly woman belonging to the Chinese Uyghur Moslem minority stands defiantly in front of a riot police vehicle and soldiers during a protest in Urumqi, China, 07 July 2009. Authorities said at least 140 people were killed and over 800 injured when Muslim Uighurs rioted in its restive Xinjiang region in some of the deadliest ethnic unrest to have hit the country for decades. The violence in the regional capital Urumqi on July 5 involved thousands of people, and triggered an enormous security crackdown across Xinjiang where tensions have long simmered amid Uighur claims of repressive Chinese rule. (Photo by Oliver Weiken/EPA)

Women take pictures in front of a Santa Claus figure outside a shopping mall ahead of Christmas in Dongguan, Guangdong province, December 20, 2012. (Photo by Reuters/China Daily)

A car jumps over a sand dune as spectators stand by during a cross country event in Wudi county, Shandong province, December 2, 2012. Picture taken December 2, 2012. (Photo by Reuters/China Daily)

Policemen gesture to a driver stranded in a car on a flooded road as waves are whipped up by typhoon Bolaven in Qingdao, Shandong province, August 28, 2012. Gales and downpours brought by typhoon Bolaven swept through parts of northeast China from Tuesday evening to Wednesday, flooding cities and delaying flights, Xinhua News Agency reported. (Photo by Reuters/China Daily)

A woman wearing bright, colourful clothes talks on her mobile phone while standing on a street during sunset in central Beijing October 30, 2012. (Photo by David Gray/Reuters)