Introduction to Tianlu: Tianjie Plank Road is a cultural landscape of Yaoshan Scenic Area. It is a hanging ladder welded by artificial steel frame structure on the cliff of the West City Wall. It starts from Sansongtai in the north and ends at Xicheng Gate in the south. With a total length of 416 meters and 175 levels, it is one of the most dangerous landscapes in Yaoshan Mountain.