China's President Xi Jinping will hold talks with Iranian President Ebrahim Raisi during his visit to China over the next three days, state media reported on Tuesday.
Xi had invited Raisi to Beijing, and their meeting comes as both Iran and China face rising tensions with the United States over a range of global issues.
Ahead of his visit, Raisi wrote an editorial in China's state-controlled People's Daily in which he said both countries believe that unilateralism and "violent" measures such as the imposition of "unjust" sanctions are the main causes of crises and insecurity in the world.
In the editorial, Raisi described China as an "old friend", and said Iran's efforts to strengthen bilateral relations would unaffected by regional and international situations.
The two governments are expected to sign cooperation documents during the visit, according to Iran's state news agency IRNA.
Xi and Raisi pledged to forge a stronger alliance when they last met in person on the sidelines of the Shanghai Cooperation Organisation summit in the Uzbek city of Samarkand in September.
(Reporting by Liz Lee and Bernard Orr; Editing by Ed Osmond & Simon Cameron-Moore)