Introduction to the plank road relics of the Northern Wei Dynasty: Halfway up the cliff on the east bank of Jinlong Gorge, there are still remains of the plank road from the Northern Wei Dynasty. In ancient times, people used wood to build roads on the suspended steep walls to avoid natural disasters. Now only the stone holes of the plank road remain. The plank road was called "Yunge" in ancient times. It was connected to the Hanging Temple on the west bank by a suspension bridge, which was called "Hongqiao" in ancient times. This steep "Yunge Hongqiao" was once one of the ancient scenic spots in Hengshan Mountain at that time.