Tangra is a region in east Kolkata that traditionally housed a large number of tanneries owned by people of Hakka Chinese origin. "47 South Tangra Road", may be the most confusing postal address, as it used to cover the whole of Chinatown Tangra with over 350 tanneries. Most of the standing structures have been built, over many years, by the industrious Hakka Chinese, upon marshy and reclaimed low lying land. Over the past several decades, it has served as the location of Calcutta's Chinatown. This is not a coincidence; the Hakka Chinese of Calcutta have gradually turned this part of the Kolkata into an important destination for sourcing finished and semi-finished leather. The Hakka Chinese specialized in the manufacture of leather and turned it into one of the major industries of West Bengal, providing employment to tens of thousands of local inhabitants. In addition to the huge volume of exports to the developing and developed countries, finished leather is supplied to the major shoe and leather goods manufacturers all over the country.