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Introduction to Tianzhu Pass: Tianzhu Pass was an important passage from Lingchuan, Shanxi to Huixian, Henan in ancient times. It was a narrow path between the twin peaks of Tianzhu. The four characters "Jin-Bian Throat" are engraved on the artificial stone gates of the two peaks. There are inscriptions from the Ming Dynasty on the peak walls, which record the reasons for the fortification and the list of garrison commanders at that time. The east side of Tianzhu Guan is a cliff, and the west side has a "overpass" across a deep stream.