A reporter is blocked as he tries to cover the fire at the Dalian Petrochemical Company of PetroChina, a leading onshore oil producer of the nation, in Dalian, Northeast China's Liaoning province, July 16, 2011. [Photo/Xinhua]

Chinese firemen try to put out the fire at the Dalian Petrochemical Company of PetroChina, a leading onshore oil producer of the nation, in Dalian, Northeast China's Liaoning province, July 16, 2011. [Photo/Xinhua] 

Chinese firemen try to put out the fire at the Dalian Petrochemical Company of PetroChina, a leading onshore oil producer of the nation, in Dalian, Northeast China's Liaoning province, July 16, 2011. [Photo/Xinhua] 

Chinese firemen try to put out the fire at the Dalian Petrochemical Company of PetroChina, a leading onshore oil producer of the nation, in Dalian, Northeast China's Liaoning province, July 16, 2011. [Photo/Xinhua]