The Iranian Tehran International Industrial Exhibition (TIIE) has been held since 2000 and is held annually. It is the Iranian government that has divided the well-known international trade exhibitions for many years into professional exhibitions with industry characteristics. Hosted by the International Exhibition Corporation. Now it has formed a large scale. The international exhibitors come from the Middle East, Asia, Africa, Europe and other countries. The scale of the exhibition is large, there are many exhibitors, the range of exhibits is wide, and the market demand is strong. The exhibition area is 43,500 square meters. A total of more than 700 companies participated in this exhibition. Six countries participated in the name of the country. 24 countries exhibited in the name of agents. The people visited were mainly Iranian businessmen, as well as businessmen from the Middle East and West Asia.

The large amount of infrastructure construction of Yilang has greatly stimulated the export of China's related construction machinery and equipment to Iraq. Yilang has become one of the main markets for overseas engineering contracting and export of mechanical and electrical products. Chinese merchants have good quality and reasonable prices, and have a high degree of recognition in the Iranian market, and their market share has increased year by year.