The US is battling to overcome resistance from China to sweeping financial sanctions against North Korea's nuclear programme.
While Beijing joined the world's other big powers last week in approving United Nations measures against specified North Korean individuals and institutions, it has yet to decide on how to apply separate, more extensive restrictions on banking transactions with Pyongyang – despite pressure from Washington.
The issue is particularly important because US officials acknowledge that China, North Korea's biggest trading partner, is the key to increasing pressure on Pyongyang and that financial pressure may be more important than any other form of leverage.
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