Beijing

Perhaps more than any other capital in the world, Beijing has closely observed the change of the guard in the Kremlin. There are many reasons for Beijing's concerns: Russia's revival as a major power, its petro-politics approach to foreign relations, managing the Shanghai Cooperation Organization (SCO), not to mention the stability of the 4,300-kilometer Sino-Russian border.

The US has expressed worries over China's military plans and urged Beijing to clarify the intentions behind its military buildup.