Fishburn and Hughes: Sin: The Islamic name for China. Averroës’ Search
Sin Kalan (Sin-i Kalal) Literally 'Great China': the Arabic and Persian name for the seaport of Canton during the Mongol period. After contact with Hindu and Arab seamen and traders in the tenth century the city grew enormously. It was the first Chinese port to be visited regularly by European merchants. Averroës’ Search