Zhou Jiping, vice chairman and president of PetroChina Ltd., attends a press conference to announce the interim results in Hong Kong Thursday, Aug. 25, 2011. PetroChina, China's biggest oil and gas ... more 
Zhou Jiping, vice chairman and president of PetroChina Ltd., attends a press conference to announce the interim results in Hong Kong Thursday, Aug. 25, 2011. PetroChina, China's biggest oil and gas company, said Thursday that first-half profit edged up 1 percent as losses in its refining business eroded gains from higher oil and gas output. (AP Photo/Vincent Yu) less 
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Associated Press | Photo By Vincent Yu
Thu, Aug 25, 2011 5:40 AM EDT