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Iranian President Hassan Rouhani (R) and China's President Xi Jinping attend a welcoming ceremony at the Xijiao State Guesthouse in Shanghai on May 22, 2014. AFP PHOTO / POOL / Kenzaburo Fukuhara (Photo credit should read Kenzaburo Fukuhara/AFP/Getty Images)

Iranian President Hassan Rouhani (R) and China's President Xi Jinping attend a welcoming ceremony at the Xijiao State Guesthouse in Shanghai on May 22, 2014. AFP PHOTO / POOL / Kenzaburo Fukuhara        (Photo credit should read Kenzaburo Fukuhara/AFP/Getty Images)