Emperors, aristocratic families and other families in other countries in the world also have the tradition of genealogy. The value of genealogy archives is valued by all countries, and many countries have established organizations and institutions to study and preserve genealogy archives. The World Genealogy Society is a worldwide organization with more than 4 million members distributed all over the world. There are many genealogical organizations in Europe and America with different names. In France alone, there are more than 10 genealogy societies and more than 40 genealogy clubs, with more than 10000 full members, and more than 20,000 scattered people studying their own genealogy. The Genealogy Society in Utah, USA, specializes in collecting and studying genealogy archives from all over the world. There are more than 5,000 kinds of genealogies in China alone. In recent years, it has collected tens of thousands of meters of film of hundreds of genealogies in China. It also built an archive cave in Salt Lake City to preserve genealogy archives, and opened a genealogy library for reference by researchers and root seekers. Chinese in Southeast Asian countries have established various clan organizations in the name of surnames. For example, in Thailand, 53 overseas Chinese organizations have surnames. Among them, the Liu clan association has more than 800 members, located in Bangkok, with branches all over the country. They made textual research on the origin of surnames and compiled a detailed genealogy.