Zhengding (Chinese: 正定; pinyin: Zhèngdìng) is a county of southwestern Hebei province, China, located approximately 260 km (160 mi) south of Beijing. It comes under the administration and is located just to the north of the urban core of Shijiazhuang and has a population of 594,000. Zhengding has been an important religious center for more than 1,000 years, from - at least - the times of the Sui Dynasty to the Qing Dynasty.