Family trees, also known as family trees, are historical books that record the blood lineage, people and deeds of the same ancestors, including the ancestry of a family, generational reproduction, migration and distribution, marriage and marriage. Marriage, occupation, education, economic status, social status, biography and many other aspects of information.
Family trees include a large amount of research-worthy materials such as demography, sociology, economics, history, folklore, and education. Together with official history and local chronicles, they constitute the three major pillars of the history of the Chinese nation. pillar. Genealogy was first recorded on oracle bone fragments unearthed from the Yin Ruins, and later became the prerogative of emperors and princes to record their lineages. During the Wei and Jin Dynasties, genealogy served as the basis for intermarriage and officialdom between families. During the Tang and Song dynasties, people gradually began to privately compile family trees. It was very prosperous during the Ming and Qing dynasties, but was stopped after the founding of New China.
Family trees are usually revised once every 30 years and once every 60 years.