Tangshan is a largely industrial prefecture-level city in Hebei Province. It has become known for the 1976 Tangshan earthquake which measured 7.8 on the Richter scale and killed at least 255,000 residents. The city has since been rebuilt and has become a tourist attraction. Tangshan's prefecture population was 7,577,284 at the 2010 census, with over 3 million in the 6 core districts. Tangshan was in the territory of Guzhu Kingdom(1600 B.C.) in the Shang Dynasty, became a part of Yan Kingdom (one of the seven Warring States, 403 B.C--221 B.C.), and later included to Youzhou in the Han Dynasty. It was under the jurisdiction of Yongping Province and Zunhua State successively in the Qing Dynasty.