A woman walks past a poster showing an offshore work platform from CNOOC in Beijing

 
A woman walks past a poster showing an offshore work platform from CNOOC in Beijing
A woman walks past a poster showing an offshore work platform from the China National Offshore Oil Corp (CNOOC) next to its headquarters building in Beijing, December 10, 2012. CNOOC's promise of transparency, pledged to win approval from Canada for its $15.1 billion purchase of Nexen Inc, looks like a positive step on the face of it but is unlikely to represent a sea change in Chinese business practices. REUTERS/Jason Lee