Yunnan Jianshui 17-hole bridge, also known as Shuanglong Bridge, is located five kilometers west of Jianshui Ancient City. It can be reached by bus or small train. The 17-hole bridge in Tongheyuan is very similar. It was built in the Qingqianlong period. It is one of the ten most beautiful ancient bridges in China. Bridge expert Mao Yisheng once came here to visit. It is the largest and most artistically valuable porous bridge in Yunnan Province. The sunset scenery is beautiful, it is worth seeing, and no tickets are charged.