Khodro Semnan Production Plant (producing 100,000 Samand cars per year), Oqab Afshan Production Plant (largest bus production plant in the region of Asia), the Semnan Sodium Carbonate Company (largest in the region of Asia), and the Semnan Rolling Mills Group (major producer of piping and profiles). One of the largest industrial zone in the city is the Semnan Industrial Town, which features 2,100 hectares of land and 900 industrial units. Agricultural sector Agricultural traditions still persist around and within the city of Semnan. The Golrudbar river, which starts in the Alborz mountains in the north, runs through the western side of the city. With proper irrigation, the municipality has managed to convert the entire southwestern portion of the city into green and lush pomegranate gardens. Around the city, further irrigation of the Golrudbar river and the surrounding creeks and tributaries have provided the proper environment for the cultivation of herbs, eggplants, potatoes, walnuts, and cotton. Semnan also produces handwoven rugs called Glim. These rugs consist of naturally dyed wools, woven into elaborate tribal and local designs. Demography and ethnic influences Majority of the city dwellers are Persians. Older Semnan was made up of four main districts: Shaji (Shahjoo), Naasaar, Latibaar and Espanjon (Esfanjan). These four districts still exist today, but the city has grown and become much larger including some new districts. To the west of the city is "Maleh" which used to be a separate settlement but was not a part of Semnan. In the local language the inhabitants are known as Malezh. "Maleh" consists of three parts: Koery (Kodivar), Koshmeni (Kushmaqaan) and Zaveni (Zavaqaan). "Maleh" is now part of Semnan. As a result of the Qajar dynasty's heavy influence on the city of Semnan, especially under Fath Ali Shah's reign, some families in Semnan can trace their lineage back to the Qajar dynasty. Furthermore, much of the city's most important monuments have been built under Turkic dynasties. For example, the Jame' Mosque of Semnan, constructed nearly 1,000 years ago, was built by the Seljuq dynasty. The Imam Mosque, originally known as Soltani Mosque, was constructed by the Qajar dynasty. The Gate of Semman, or Arg e Semnan, which is the representative symbol of the city of Semnan, was also constructed by the Qajar dynasty. Many other historical sites within the city and the surrounding villages demonstrate a strong Turkic and Ilkhanate influence in their architectural designs. Also, much