A soldier wearing a costume parachutes during a performance for an international tourism festival in Fushun, Liaoning province, June 29, 2013. REUTERS/Jacky Chen (CHINA - Tags: SOCIETY TRAVEL) 

A soldier wearing a costume parachutes during a performance for an international tourism festival in Fushun, Liaoning province, June 29, 2013. REUTERS/Jacky Chen (CHINA - Tags: SOCIETY) 

A labourer couple nap under an umbrella at an open-air dumpsite of a coal mine on the outskirts of Fushun, Liaoning province August 21, 2011. China's thermal coal prices tottered for the seventh week as ample inventories kept buyers at bay, but a narrower weekly fall in prices and a steady decline in coal stocks at key import terminals may herald an imminent rebound. REUTERS/Stringer (CHINA - Tags: ENERGY BUSINESS) 

A labourer filters coal out of cinder at an open-air dumpsite of a coal mine on the outskirts of Fushun, Liaoning province August 21, 2011. China's thermal coal prices tottered for the seventh week as ample inventories kept buyers at bay, but a narrower weekly fall in prices and a steady decline in coal stocks at key import terminals may herald an imminent rebound. REUTERS/Stringer (CHINA - Tags: ENERGY BUSINESS IMAGES OF THE DAY) 

Labourers filter coal out of cinder at a dump site of the Xilutian coal mine on the outskirts of Fushun, Liaoning province July 15, 2009. Some of China's small coal mines are returning to production as the country enters the hottest time of the year, releasing some of the tightness in the market caused by efforts to tighten safety by shutting small mines, industry officials and analysts said on Tuesday. REUTERS/Sheng Li (CHINA ENERGY BUSINESS) 

Labourers filter coal out of cinder at a dump site of the Xilutian coal mine on the outskirts of Fushun, Liaoning province July 15, 2009. Some of China's small coal mines are returning to production as the country enters the hottest time of the year, releasing some of the tightness in the market caused by efforts to tighten safety by shutting small mines, industry officials and analysts said on Tuesday. REUTERS/Sheng Li (CHINA ENERGY BUSINESS) 

Labourers filter coal out of cinder at a dump site of the Xilutian coal mine on the outskirts of Fushun, Liaoning province July 15, 2009. Some of China's small coal mines are returning to production as the country enters the hottest time of the year, releasing some of the tightness in the market caused by efforts to tighten safety by shutting small mines, industry officials and analysts said on Tuesday. REUTERS/Sheng Li (CHINA ENERGY BUSINESS) 

Labourers filter coal out of cinder at a dump site of the Xilutian coal mine on the outskirts of Fushun, Liaoning province July 15, 2009. Some of China's small coal mines are returning to production as the country enters the hottest time of the year, releasing some of the tightness in the market caused by efforts to tighten safety by shutting small mines, industry officials and analysts said on Tuesday. REUTERS/Sheng Li (CHINA ENERGY BUSINESS) 

Labourers filter coal out of cinder at a dump site of the Xilutian coal mine on the outskirts of Fushun, Liaoning province July 15, 2009. Some of China's small coal mines are returning to production as the country enters the hottest time of the year, releasing some of the tightness in the market caused by efforts to tighten safety by shutting small mines, industry officials and analysts said on Tuesday. REUTERS/Sheng Li (CHINA ENERGY BUSINESS)