In ancient China, there were various forms of genealogy, including bronzes, calligraphy and sculpture. Yin-yang genealogy is one of them, which was a special genealogy form before, and it is different from ordinary genealogy in form. Yin spectrum records the family spectrum of women, while Yang spectrum records the family spectrum of men, so it is called Yin-Yang spectrum. In ancient times, the Yin-Yang spectrum was carved with bamboo, and each generation of married women recorded it on the Yin spectrum, while men recorded it on the Yang spectrum.
With the evolution of history, social development and cultural integration, the Yin-Yang genealogy has been gradually eliminated and replaced by a complete genealogy in paper form. Due to complicated writing of Yin-Yang genealogy, difficult preservation of materials, changes of the times, population mobility and other reasons, people's vision gradually faded out, and the complete genealogy gradually replaced Yin-Yang genealogy and became the main form of preserving ancestral atlas.