Ziwuling

　　Ziwuling is a branch of the Qiaoshan Mountain Range, situated between the two major river systems of the Jing River and the Luo River. Historical records state that it extends westward to Ningqing, eastward to Yan'an, southward to Yaozhou, and northward to Yanie, stretching over 400 kilometers. It spans 24 towns and townships across four counties in Qingyang City — Zhengning, Ning, Heshui, and Huachi — with its main ridge extending more than 250 kilometers and covering an area of over 4,900 square kilometers.

　　The legendary Chinese ancestor, the Yellow Emperor (Huangdi), once thrived in this region, "migrating and traveling, cutting through mountains and forging paths," clearing the wild land. His mausoleum is located on the Qiaoshan Mountain, which lies on the eastern side of Ziwuling, hence Ziwuling is also referred to as the "Path of the Sages."

　　The famous Qin Straight Road (Qin Zhidao) winds along the main ridge of Ziwuling, transforming rugged mountain barriers into traversable routes. After more than two thousand years of weathering, traces of the Qin Straight Road remain clearly visible, and some sections can still be driven on today.

　　Ziwuling boasts not only beautiful plateau scenery but also a long and splendid historical and cultural heritage, as well as abundant flora and fauna. Over 200 species of timber and economic trees grow here, including pine, cypress, and birch.

　　The area is also home to more than 150 species of wildlife such as leopards, roe deer, civets, and black storks.

　　The forests of Ziwuling are not only valuable timber resources but also play a crucial ecological role, hailed as the "Green Barrier" of eastern Gansu and the "Natural Reservoir" of the Loess Plateau.