[August 24, 2011 H. Roger Schwall John Cannarella Mark C. Shannon Division of Corporate Finance 100 F Street, NE Re: PetroChina Company Limited Form 20-F for Fiscal Year Ended December 31, 2009 Filed June 25, 2010 Form 20-F for Fiscal Year Ended December 31, 2010 Filed May 10, 2011 Response Letter Dated October 28, 2010 Response Letter Dated April 28,]