ST. PETERSBURG, August 30. /TASS/. Gazprom positively assesses progress in negotiations on the "Western Route" gas supply contract with China. Document signing depends on volumes, rather than on the price, Deputy Chief Executive of the Russian holding Alexander Medvedev told TASS on Tuesday.

"The process is underway; working groups are meeting. The issue is regarding volumes and not the price. I believe negotiations are at an advanced stage. Prospects are good," Medvedev said.

Gazprom and China’s CNPC signed heads of the agreement on pipeline gas supplies to China over the "Western Route" (Power of Siberia-2 gas pipeline) in 2015. Deliveries of Russian gas to China over this route may start from May 2019 to May 2021, Chief Executive of Gazprom Alexei Miller said earlier.