Chinese foreign minister Wang Yi arrived in Geneva, Switzerland on Saturday to participate in negotiations between Iran and G5+1, IRNA reported.
Wang Yi is the last foreign minister of the six countries negotiating with Iran who joins the current series of talks in Geneva.
US Secretary of State John Kerry and his counterparts from Germany, France and Britain arrived in Geneva earlier in the day.
Russian Foreign Minister Sergei Lavrov arrived in Geneva Friday night and held talks with his Iranian counterpart Mohammad Javad Zarif.
Meanwhile, Zarif held tripartite negotiations with US Secretary of State John Kerry and European Union foreign policy chief Catherine Ashton on Saturday.
Iran and G5+1 are scheduled to continue with talks at foreign ministers level.