The logo of PetroChina is seen behind a traffic sign at its headquarters in Beijing
The logo of PetroChina is seen behind a traffic sign at its headquarters in Beijing March 17, 2015. PetroChina Vice Chairman Liao Yongyuan is being investigated for "serious disciplinary violations", the company said, as an anti-corruption crackdown reaches deeper into the Chinese state-owned oil giant.
REUTERS/Kim Kyung-Hoon (CHINA - Tags: POLITICS CRIME LAW ENERGY BUSINESS LOGO)