Officials argue that that political and security issues trump any economic consequences.
Moscow has offered to act as intermediary in delimitation efforts.
Pro-Russian politicians accuse head of state of colluding in abduction
Beijing believes an epochal struggle for mastery is already underway.
China's aggression appears diplomatically inept, but provoking Western hostility can bring rewards.
Move to nationalise aviation firm interpreted as a sign Kyiv views Washington as a more useful strategic partner than Beijing.
Critics fear that risks outweigh any potential benefits.
The devastating effect of decades of neglect and corruption have been exacerbated by conflict.
Progress remains slow, despite wide ranging shared interests.
Engagement has focused more on economic cooperation than conflict resolution.