What's behind Russia's massive energy deal with China?

The huge energy deal enables Russia to supply 38 billion cubic metres (bcm) of gas to China each year for 30 years under a contract valued in excess of US$400 billion overall. See a report of the South China Morning Post here

Before the deal was signed at the eleventh hour on 21 May, my live TV interview with RT on 20 May tried to pinpoint some of the geopolitical considerations involved on both sides and their impact on the world order.