from RT.com: After 10 years of negotiations, Russia's Gazprom and China's CNPC have finally signed a historic gas deal which will provide the world's fastest growing economy with the natural gas it needs to keep pace for the next 30 years. The total value of the contract is $400 billion, Gazprom CEO Aleksey Miller said. However, the price of gas stipulated in the document remains a "commercial secret." Assuming the overall price of the contract includes only the cost of supplies of Russian gas, then the $400 billion price tag means China will pay about $350 per 1,000 cubic meters. Delivery price for the contract will be tied to market oil prices, Putin said from Shanghai on Tuesday.