You didn't say the specific period, so I positioned myself in the Abbasid dynasty. Baghdad is located in two river basins, with fertile soil and convenient transportation. To the east, silk, tea and pottery were imported from Persia, Tianshan Western Regions, Tang Dynasty and other countries. It takes Damascus as the transportation point to the west, transporting tortoise shells, camels, ivory and amber from the Arab world, Egypt and countries around the Mediterranean to the east. Located in the main road of Eurasia and the hub of the Silk Road, it has a developed population and close trade with the East and the West. In the 8th century, it was no less than Chang 'an's trading metropolis.