Vice Foreign ster Cheng Guoping said on Thursday that China and Russia are expected to  reach aments on natural gas during Russian President Vladimir Putin's visit to China. 

Putin will pay a state visit to China from May 20 to 21 at the invitation of Chinese President Xi Jind attend the fourth summit of the Conference on Interaction and Confidence Building Measures in Asia (CICA) in Shanghai. 

During their meeting in Sochi, Xi and Putin reached important agreements on gas, and the vast majority of the text of contracts was agreed. 

The gaps between the two sides are mainly on price, Cheng said, adding that the companies involved are in negotiations in Moscow.