This book is the second volume of the Comparative Study of Ancient Equestrian Cultures in Eurasia research project and also the first publication on Mongolian harnesses published in both Korea and Mongolia. In May 2022, a team of researchers from the NRICH Research Division of Archaeology conducted an exhaustive investigation into Mongolian bits, spanning from the Bronze Age to the Mongol Empire. This compilation includes detailed photographs of 30 select bits complemented by electronic renderings generated through 3D scanning technology, alongside comprehensive descriptions of the artifacts.