The President of the Russian Federation is in China and pursues various economic deals with the country. A huge gas deal, though it may not get signed yet, is in the making in which Russia will deliver natural gas and oil to China over a period of 30 years. The payments will be made in rubles and yuan leaving the dollar out of the business.
This is the long expected start of an Eurasian axis. Russia has plenty of natural resources, good basic industries and world class research and weapon productions. China has lots of people and high tech manufacturing capabilities. Together China and Russia would be a major powerblock that could exist, if needed, mostly independent of the "western" ruled global political and economic system.
Russia expert Mark Adomanis thinks that such an alliance would be disaster for the west though he does not really explain why. It seems that the inability of the "west" to influence such a block is what he perceives as a "disaster".
The U.S. can not effect Russia through economic or financial sanctions when Russia can circumvent those through its ally China, the worlds biggest economy. And one can not threaten China's access to energy resources by sea when China can get more than enough of those through direct land pipelines from Russia. The U.S. capability to influence or threaten such an alliance would be much smaller than it is against two separate states.
But the U.S. has no one but Obama and his hawkish secretaries of state to blame for the rather natural Russian-Chinese alliance. Those two countries historically do not like each other very much and in social terms don't have much in common. But Obama has done his best to give them a common enemy. Such an enemy always tends to unite even non-friends. Pushing sanctions against Russia after the "west" arranged an anti-Russian coup against Russia's neighbor was too much for Russia to swallow. Add missile defense and a general hate throughout "western" media against Putin and the Russian system and you end up with a virtual enemy. On China's side Obama's "pivot" to Asia, encouraging of Japanese militancy and sanctions over alleged cyberspying were enough to push it to look for new relations.
I agree with Adomanis that the U.S. would loose power if a Russian-Chinese alliance evolves but I can not see any "disaster" in that. A less unchallenged position and smaller global role for the U.S. would likely be beneficial for and viewed positive by the "rest of the world." It would at least restrict some of the typical U.S. militancy.
Europe will not join the new alliance but it should keep a neutral stance between the U.S. and the Russian-China axis. It will otherwise become a U.S. pawn on a global chessboard and will be sacrificed, possibly in another big war, as soon as Washington finds that to be convenient.