Thai Nguyen Iron and Steel Joint Stock Company (TISCO), formerly known as Thai Nguyen Iron and Steel Company, was started construction in 1959, and is the first industrial park in Vietnam to have a closed integrated production line from coking coal and iron ore mining to coking, iron smelting, steel smelting and steel rolling. On November 29, 1963, the first batch of cast iron was produced and this day is considered the traditional day of Thai Nguyen Iron and Steel workers.