By Parisa Hafezi (Reuters) -For Iran's clerical leaders, engaging with the "Great Satan" to hammer out a nuclear deal and ease crippling sanctions may for once be the lesser of two evils. Though it harbours deep mistrust of the United States,

Beijing sought to position itself as a key player in negotiations with Iran over its nuclear program, as President Trump called for talks with Tehran.

Ministers from Iran, Russia and China meet in Beijing to discuss Tehran's nuclear programme and call for end to U.S. sanctions.