 Kailuan, with a history of over 100 years, is one of China's first modern coal mines, and remains a major mine with an annual production of over 20 million metric tonnes.Much of the North China Oilfield is found in Hebei, and there are also major iron mines at Handan and Qian'an.Iron, as well as steel, manufacturing are the largest industries in Hebei, and are likely to remain so as these industries consolidate and Hebei continues to grow as a manufacturing and transportation center for the region.