Ref: The first oil pipeline linking the world`s biggest oil producer, Russia, and the world`s biggest consumer of energy, China, has begun operating.
Until now, Russian oil has been transported to China by rail.
Concentrated in western Siberia, Russia`s network of pipelines for oil exports has so far run towards Europe.
Russia is expected to export 15m tonnes of oil through the new pipeline each year – about 300,000 barrels a day.
The project cost $25bn ($16bn) and was partly financed be Chinese loans.
Russia overtook Saudi Arabia as the world`s largest oil producer in 2009.
China surpassed the US as the world`s largest consumer of energy last year.