China and other key world powers, except the US, have keen national interests at stake as far as Teheran is concerned

The United States has been drumming up efforts for a fresh round of UN sanctions against Iran, with its European allies Britain, France and Germany standing steadfast, and China and Russia wavering on the issue.

The five permanent UN Security Council members plus Germany have formed a key multilateral mechanism (P5 plus one) that can determine the fate of Iran's dispute with the international community over its nuclear program.