Russia's President Vladimir Putin has signed a multi-billion dollar, 30-year gas deal with China.
The deal between Russia's Gazprom and China National Petroleum Corp (CNPC) has been 10 years in the making.
Russia has been keen to find an alternative energy market for its gas as it faces the possibility of European sanctions over the crisis in Ukraine.
No official price has been given but it is estimated to be worth over $400bn.
President Putin said in a statement to the Russian news channel Rossiya: "The price is satisfactory for both sides.