Artists in costumes perform traditional Chinese opera next to a street in Changsha, Hunan province April 8, 2015. (Photo by Darwin Zhou/Reuters)

In this Tuesday, March 24, 2015 photo, Chinese women holding toy guns march to a revolutionary song during their daily exercises at a square outside a shopping mall in Beijing. The group is a part of senior health trend that has filled squares and apartment courtyards across China, winning the admiration of medical experts but upsetting neighbors over the noise level. (Photo by Andy Wong/AP Photo)

Militia members practice firing artillery shells to create artificial rainfall in Zouping county in eastern China's Shandong province, Wednesday, March 25, 2015. An ongoing drought in the region has led officials to plan to start using cloud seeding in April to help boost the annual wheat crop. (Photo by AP Photo/Stringer)

In this photo released by Xhinhua News Agency, a rescuer evacuates residents near the site of a chemical plant blast in Zhangzhou, southeast China's Fujian Province Tuesday, April 7, 2015. Six people have been hospitalized and hundreds of firefighters deployed to battle a blaze sparked by an explosion at Goure PX Plant that produces the toxic chemical paraxylene, officials said Tuesday. (Photo by Wei Peiquan/AP Photo/Xinhua)

Villagers go about their local religious practice near the site of an explosion at the Goure PX Plant in Zhangzhou in southern China's Fujian province on Tuesday April 7, 2015. (Photo by AP Photo/Stringer)

Firefighters try to extinguish a fire at a petrochemical plant in Zhangzhou, Fujian province April 7, 2015. At least six people were injured after an explosion hit part of an oil storage facility on Monday at Dragon Aromatics, Xinhua reported. The fire, which had been put off, resumed at around 7:40 p.m. on Tuesday. It was later extinguished again at around 11:40 p.m., at the plant that produces paraxylene, or PX, a chemical used in making polyester fibre and plastics, state media said. (Photo by Reuters/Stringer)

Firefighters salute to a burnt-out firefighter truck after they extinguished a fire at a petrochemical plant in Zhangzhou, Fujian province April 9, 2015. (Photo by Reuters/Stringer)

Teachers select and grade paintings done by candidates taking part in an entrance examination at China Academy of Art in Hangzhou, Zhejiang province, March 25, 2015. (Photo by Chance Chan/Reuters)

A worker paints as he restores the gold foil on the thousand-hands Bodhisattva in Chongqing Municipality, March 25, 2015. The restoration project which started 2008 draws to an end for the statue originally carved in the Southern Song Dynasty (1127-1279). (Photo by Reuters/China Daily)

Participants compete in the traditional game “Snatching the Lamb”, also known as Diaoyang in Chinese, during a traditional sports gathering in Kashgar, Xinjiang Uighur Autonomous Region March 27, 2015. Snatching the Lamb, which is a popular game among the Kazaks, requires five to eight horsemen riding their horses and trying to grab a headless lamb carcass with one hand. The winning team is the first to bring the lamb to a designated place. (Photo by Reuters/China Daily)

Workers practice maintenance work on an electricity pylon among crop fields in Chuzhou, Anhui province April 1, 2015. China's power consumption in the first two months of 2015 reached 845.4 billion kilowatt hours (kWh), up 2.5 percent compared to the same period last year, the National Energy Administration (NEA) said on March 16. (Photo by Reuters/Stringer)

A worker burns bamboo charcoal at a mill at Huoshan county, Anhui province, April 4, 2015. Huoshan is known as “the county of bamboo” in China. Bamboo proccessing is one of the pillar industries of the local economy, according to local media. (Photo by Reuters/Stringer)

A worker carries bamboo at a mill at Huoshan county, Anhui province, April 4, 2015. (Photo by Reuters/Stringer)

Primary school students in Red Army uniforms visit a Martyrs' Cemetery ahead of the Qingming Festival, or Tomb Sweeping Festival, in Yecheng, Xinjiang Autonomous Region, April 4, 2015. The Qingming festival, which falls on April 5 this year, is a day for the Chinese to remember and honour their ancestors. (Photo by Reuters/Stringer)

Primary school students in Red Army uniforms clean tombs at a Martyrs' Cemetery ahead of the Qingming Festival, or Tomb Sweeping Festival, in Yecheng, Xinjiang Autonomous Region, April 4, 2015. (Photo by Reuters/Stringer)

A man places bouquet at a Martyrs' Cemetery for soldiers of the Chinese People's Volunteers (CPV) who died in the 1950-53 Korean War, on the Qingming Festival, or Tomb Sweeping Festival, in Shenyang, Liaoning province, April 5, 2015. (Photo by Reuters/Stringer)

People pay respect to their deceased relatives at a public cemetery ahead of the Qingming Festival, or Tomb Sweeping Festival, in Quanzhou, Fujian province, April 4, 2015. (Photo by Reuters/Stringer)

People take pictures at a university in Xi'an, Shaanxi province, April 3, 2015. (Photo by Reuters/Stringer)

A man takes pictures of a miniature Rolls-Royce model made of gold, on display at a shopping mall in Shenyang, Liaoning province, April 5, 2015. (Photo by Reuters/Stringer)

Visitor stretch out along pillars near the Beijing National Stadium, also known as the Birds Nest, in Beijing, Sunday, March 29, 2015. Organizers of the IAAF World Championships officially announced the start of ticket sales for the track and field contest on Sunday, which will be held at the stadium from August 22 to 30. (Photo by Mark Schiefelbein/AP Photo)

Buddhist monks carry a Buddha statue after a parade on ethnic Dai's Vesak Day, or Buddha's Birthday in Anning, Yunnan province, April 6, 2015. (Photo by Wong Campion/Reuters)

Former NBA player Yao Ming (R) and Chinese hurdler Liu Xiang, delegates of the Chinese People's Political Consultative Conference (CPPCC), arrive at the Great Hall of the People to attend the third plenary meeting of CPPCC at the Great Hall of the People in Beijing, in this March 11, 2015 file photo. China's Olympic gold medal-winning hurdler Liu announced his retirement on April 7, 2015, ending a run in the sport marked by records and frustrated by successive late-career injuries. (Photo by Kim Kyung-Hoon/Reuters)

An 8-year-old acrobat (R) walks on a tightrope away from a traditional Chinese building during a performance for visitors at a tourist attraction in Hefei, Anhui province April 8, 2015. (Photo by Reuters/Stringer)

An aerial view shows a replica of the Eiffel Tower (C) and residential buildings at the Tianducheng development in Hangzhou, Zhejiang province April 8, 2015. (Photo by Reuters/Stringer)

Villagers look on as a home-made armoured vehicle, built by local 35-year-old farmer Liu Shijie (in the vehicle), drives on a dirt road at a village in Huaibei, Anhui province April 7, 2015. It took Liu about six months and over 30,000 yuan ($4,850) to make the 5-metre-long, 3-metre-high vehicle from steel plates he purchased and pieces of a dismantled agricultural car, local media reported. (Photo by Reuters/Stringer)

A farmer plows terraced crop fields in Congjiang county, Guizhou province April 8, 2015. (Photo by Reuters/China Daily)

Women activist Wu Rongrong, 30, pose for a photograph with papers which read “Women graduates are talented, only hiring men is frustrating” (top) and “I invite the head of Human Resources and Social Security department to go to the job market with me”, in this undated handout picture taken in an unknown location in China, provided by a women's rights group on April 8, 2015. Chinese police are broadening their investigation into five detained women activists to focus on their campaigns against domestic violence and for more public toilets for women, their lawyers said on Wednesday. The women were taken into custody on the weekend of International Women's Day, March 8, and later detained on suspicion of “picking quarrels and provoking trouble”, their lawyers said, a charge that carries jail of up to five years. Beijing police did not respond to a request for comment. (Photo by Reuters/Stringer)

A resident hangs the cages of his pet birds onto a wire at a traditional alleyway, or hutong, in central Beijing, April 9, 2015. (Photo by Jason Lee/Reuters)

Scrapped high-emission vehicles are seen piled up at a dump site of a recycling centre, waiting to be dismantled, in Yiwu, Zhejiang province April 8, 2015. According to local media, the city of Yiwu is planning to get rid of approximately 22,000 highly-polluting vehicles by the end of this year. (Photo by Reuters/China Daily)

A excavator dismantles a scrapped high-emission car at a dump site of a recycling centre in Yiwu, Zhejiang province April 8, 2015. (Photo by Reuters/China Daily)

A man speaks on his mobile phone as he stands next to piles of scrapped high-emission vehicles at a dump site of a recycling centre, waiting to be dismantled, in Yiwu, Zhejiang province April 8, 2015. (Photo by Reuters/China Daily)

Scrapped high-emission vehicles are seen piled up at a dump site of a recycling centre, waiting to be dismantled, in Yiwu, Zhejiang province April 8, 2015. (Photo by Reuters/China Daily)

A farmer feeds water to pigs at an enclosure in a pig farm in Liaocheng, Shandong province April 9, 2015. (Photo by Reuters/Stringer)

Security guards line up as they wait for instructions ahead of the Chinese F1 Grand Prix at the Shanghai International Circuit April 9, 2015. (Photo by Carlos Barria/Reuters)

People look at a giant inflated doll in the shape of a woman, on a square in Nanjing, Jiangsu province April 9, 2015. The 30-metre-long, 7-metre-wide doll was made by a local company, and also serves as a inflated “castle” for children to play inside, local media reported. (Photo by Reuters/Stringer)

A woman holding her child walks past a giant inflated doll in the shape of a woman, on a square in Nanjing, Jiangsu province April 9, 2015. (Photo by Reuters/Stringer)

A vendor waits for customers at a shop in central Beijing, April 9, 2015. China's economy probably cooled further to grow 7 percent in the first three months of the year, a Reuters poll showed, which would be the weakest pace in six years and raise pressure on policymakers to do more to bolster growth. (Photo by Jason Lee/Reuters)

A part of an overpass under construction is turned around in Zoucheng, Shandong province, in this January 19, 2015 file photo. (Photo by Reuters/China Daily)

In this picture taken on March 22, 2015, a woman plays with a tricolor ribbon in the grounds of the Temple of Heaven in Beijing. (Photo by Fred Dufour/AFP Photo)

A man drinks a can of beer as he sits with a woman near a display of figures participating in winter sports on the Olympic Green in Beijing, Saturday, March 28, 2015. The International Olympic Committee (IOC) concluded a 5-day visit on Saturday to inspect Beijing's bid for the 2022 Winter Olympics. (Photo by Mark Schiefelbein/AP Photo)

A construction worker holds a turtle for sale on a street near a construction site in Beijing April 7, 2015. In China, turtles are raised as pets, as well as food. (Photo by Kim Kyung-Hoon/Reuters)