From Gilbert Rozman, an expert on China-Russia relations at Princeton University:
They’ve [Russia and China] basically come to a consensus that despite their differences over some national interests, they really face the same common enemy, I think they’re both sending a message that their relationship is stronger than outsiders generally expect and if others put pressure on either in their own arenas, the two will stand together.
Michael Krieger’s succinct summation is spot on: “You can thank the idiotic neocons in both the Republican and Democratic parties for this outcome.”