Chinese President Xi Jinping and Russian President Vladimir Putin inaugurated the pipeline - dubbed the "Power of Siberia" - through a joint video conference. "More than a trillion cubic meters of gas will be delivered to China through the Power of Siberia pipeline over 20 years".
The pipeline will diversify Russia's gas market while providing China with an alternative steady gas supplier, said Alexei Belogorey, deputy executive director on energy studies at Russia's Institute for Energy and Finance Foundation.
The 3,000-km-long (1,865 mile) Power of Siberia pipeline will transport gas from the Chayandinskoye and Kovytka fields in eastern Siberia, for at least the next three decades and generate $400 billion in export revenue for Russian Federation. In total, the pipeline measures 3,176 miles, with 2,095 miles of new construction and 1,080 miles of pre-existing pipelines. Gazprom built the Russian side of the pipeline, which runs from new Siberian gas fields to the Chinese border.
Russian Federation is also planning to soon launch two more gas pipelines that will ramp up supplies to Europe while bypassing Ukraine.
Xi called it "a landmark project of China-Russia energy cooperation and a paradigm of deep convergence of both countries' interests and win-win cooperation". The two tunnels, each 1,139 meters long, connect Heihe in northeast China's Heilongjiang Province and Blagoveshchensk in Russian Federation.
Gas began to flow Monday through the first part of a pipeline connecting the gas fields of Siberia to eastern China, in a project which by 2024 will carry some 38 billion cubic meters of the fossil fuel as far as Shanghai each year, according to China's National Energy Administration.
Gazprom has stressed that the pipeline ran through "swampy, mountainous, seismically active, permafrost and rocky areas with extreme environmental conditions". China is upholding people-centered development, an idea-if internationalized-that maximizes equal and mutually beneficial cooperation among countries. He also hosted Russian Security Council secretary Nikolai Patrushev at the Great Hall of the People in Beijing on Monday, saying that Beijing and Moscow would stand together against interference from Washington and others.
The pipeline's capacity could further increase beyond 2024, PetroChina Vice President Ling Xiao said in June.
Nord Stream-2, which would double gas volumes to Germany, is expected to go online in mid2020, though it has faced opposition from the United States and countries in central and eastern Europe, particularly Ukraine.
TASS said that deliveries had started flowing through the pipeline as of Monday, although the amount will start small and then ramp up over the years.
The company is to supply China with 38bn cubic metres of gas annually when the pipeline is fully operational in 2025.