Gazprom has approved a feasibility study for an extension of the Power of Siberia 2 natural gas pipeline, which will connect Russia to China via Mongolia. The gas pipeline project, named Soyuz Vostok, may have an export capacity of 50 bcm/year, i.e. 1.3 times higher than that of Power of Siberia (38 bcm/year). In January 2021, Gazprom created a special-purpose vehicle in Mongolia to carry out the study.
In December 2019, Russia started supplying natural gas to China through the 3,000 km-long Power of Siberia gas pipeline project. As agreed in 2014, Russia delivers 38 bcm/year of gas to China over a 30-year period using the Power of Siberia pipeline. Gazprom supplies gas from the Chayandinskoye field in Yakutia (and from the Kovyktinskoye field located in the Irkutsk region as of early 2023) to Blagoveshchensk, at the Russian border with China, and to Changling in the Jilin province of China.