From 1347 onwards, along with the production of shoes, Meli Shoes started producing products such as socks, tweed liners, shoelaces, and other products. In the same year, the expansion of the national shoe factories started with the construction of 18 km of the old Karaj road. Irvani bought land with an area of 400 thousand square meters, and the National Shoe Industrial Park officially started its activity in the early years of the 1350s.