Shanhé Weir

　　Shanhé Weir is situated in the picturesque Bāogǔkǒu area. It was an irrigation project constructed under the direction of Xiao He and Cao Can during the time when Liu Bang stationed his army in Hanzhong. Originally, it irrigated parts of Nánzhèng and Bāochéng counties. The currently used Bāohuì Canal largely follows the original route of Shanhé Weir.

　　The weir has three main sluice heads, which can block the flow of the Bào River for irrigating farmland, playing a highly significant role in history.

　　Today, remnants from the Han Dynasty can still be found along the Shanhé Weir.