MOSCOW, June 28 (Reuters) - Russia's Gazprom will start annual pipeline gas exports to China of 10 billion cubic metres (bcm) in 2027, its boss Alexei Miller said on Friday.

He also said the Power of Siberia pipeline to China will reach its planned capacity of 38 bcm per year in 2025. (Reporting by Vladimir Soldatkin; editing by Jason Neely)