On March 14, the deputy foreign ministers of China, Russia and Iran held a trilateral meeting in Beijing on the Iranian nuclear issue. A spokesperson for the Chinese Ministry of Foreign Affairs said on the 13th that China has always advocated a proper solution to the Iranian nuclear issue through political and diplomatic means. The Beijing meeting is China’s latest diplomatic effort to strengthen communication and coordination and create conditions for the early resumption of dialogue and negotiations. Prior to this, US President Trump wrote to Iranian leaders last week, hoping that Tehran would negotiate with the United States on the nuclear issue. When asked about the Iran nuclear meeting in Beijing by reporters at the White House on March 13, US President Trump said that he had discussed denuclearization with Russian President Putin and Chinese President Xi Jinping, and Xi Jinping “liked the idea very much.” Why is China actively playing the role of mediator on the Iranian nuclear issue? What does China’s role mean for easing the Iranian nuclear crisis?