China and Iran on Saturday signed a comprehensive 25-year cooperation agreement, inked by Chinese State Councilor and Foreign Minister Wang Yi and Iran's Foreign Minister Mohammad Javad Zarif in Tehran.

The major partnership deal covers cooperation in many fields, including trade, economics, and transportation.

Wang Yi also met with Iranian President Hassan Rouhani and the advisor to the Supreme Leader, Ali Larijani.

The Chinese diplomat arrived in Iran on Friday, the third stop on his six-countries tour.