Nearly 30 cooperation documents, notably including several energy deals, were signed between China and Russia on Thursday, while Russian President Vladimir Putin was in Beijing to attend China's V-J Day celebrations.
Chinese President Xi Jinping and Putin were present at the signings.
One of the most notable deals was a framework agreement for Russia's second-biggest gas producer Novatek to obtain a 9.9-percent stake in China's Silk Road Fund's Yamal Liquefied Natural Gas project.
Earliest known discussions for the deals have been ongoing since August. The deals are estimated to be worth around $1.4 billion.
The Yamal project marks the first time the Silk Road Fund will invest in Russia. Novatek owns 60 percent of the project's shares, while French company TOTAL and China National Petroleum Corp. (CNPC) each own 20 percent.
In total, more than $10 billion have been invested in the project.
Gazprom, Russia's top gas producer, also signed a memorandum of understanding with CNPC for Russia to supply gas to China from the far east portion of Russia, according to Alexey Miller, deputy chairman of the company's board.
Russian oil company Rosneft also signed a framework agreement with ChemChina to buy a 30-percent stake in the Chinese company. Rosneft also signed a deal offering Sinopec joint development of Russia's Russkoye and Yurubcheno Tokhomskoye oil fields.
Sinopec also entered into a strategic investment treaty with Sibur, a Russian petrochemical group.
The great number of energy deals has been attributed to China's need for natural gas supplies to keep its fast-growing economy running, while Russia's economy is facing troubles despite the country's natural resources.