Iranian President Hassan Rouhani will pay a three-day visitto China on May 20 at the invitation of his Chinese counterpart Xi Jinping , Iran’sIRNA news agency reportedDuring his official visit to Shanghai, Rouhani will hold meetings with the Chineseauthorities and participate in the fourth Conference on Interaction andConfidence-Building Measures in Asia (CICA) summit to be held in Shanghai, on May20 and 21, a spokesman for the Iranian embassy in Beijing said in a statement .