Wuyi (Chinese: 武邑; pinyin: Wǔyì) is a county of southeastern Hebei province, China, served by China National Highway 106. It is under the administration of Hengshui City, 18 km (11 mi) to the southwest, and, as of 2004, had a population of 310,000 residing in an area of 830 km² (320 sq mi).