As its name suggests, PetroChina Company Ltd is the listed arm of state-owned China National Petroleum Corporation (CNPC). It is China's biggest oil producer, and is listed in Hong Kong, New York, and Shanghai.

Tears flow for gas blast victims

Survivors of China's worst industrial accident were overcome with grief yesterday as they held funerals for hundreds of their friends, family and neighbours.

Relatives solemnly carried photos of those who died and burned offerings to them in simple ceremonies.