Vladimir Putin and Xi Jinping have renewed plans for a natural gas pipeline between Russia and China - though no details about the project or a timeline for its completion have been provided so far, BBC reported. 

The previously agreed deal has been stalled for years, but the two countries reached a "general understanding" about the pipeline, an aide to Putin tells reporters.

The agreement comes as the two leaders meet in Beijing and sign more than 20 agreements on trade and tech, as well as a declaration on a "multi-polar world order"