China_Russia
Chinese President Xi Jinping (left) and his Russian counterpart Vladimir Putin attended the opening ceremony of the "Year of Chinese Tourism in Russia" at the State Kremlin Palace in Moscow, March 22, 2013. Reuters

(Reuters) - Russia's state-controlled Gazprom signed a long-awaited gas supply agreement with China on Wednesday.

There were no pricing details on the deal, which is believed to involve Russia supplying 38 billion cubic meters of gas per year to China via a new eastern pipeline linking the countries. It has been unofficially valued at over $400 billion.