Archaeologists discovered cultural relics from the Sui and post-Sui periods in the Hengshui section of the Yongji Canal of the Grand Canal. 85 sites, including the Tang and Song Dynasty Wucheng City Site in Gucheng County, the Tang Dynasty Jingzhou City Gonggao City Site.
Hebei Provincial Institute of Cultural Relics and Archeology has been working hard to promote the implementation of archaeological research and cultural relics protection projects on the Grand canal.