Guo Ziyi
Early in the 14th century, a Persian Al-Qudsan Al-Dhaghan Nam (伊本·庫斯·德廣貢·納姆) was sent to Quanzhou by Külüg Khan for assisting grain transportation by sea. He failed to return to Khanbaliq due to war, then got married and settled at Quanzhou. Because his Persian surname Dhaghan pronounces similar to Chinese Guo, Al-Qudsan Al-Dhaghan Nam's grandsons began to change their surname to Guo in order to assimilate with local Han Chinese. It was politically expedient to claim they were descendants of Guo Ziyi in order to be better accommodated by Local people and later Ming Dynasty government. After Haijin policy applied and the Portuguese began to dominate the China-Middle East maritime trade, they were more localized and recognized as descendants as Guo Ziyi by themselves and by local people.