The genealogy handed down by Zhang, the most numerous surname in Chen, is a special form of blood culture, which records the reproduction of surnames passed down from generation to generation by the Chinese nation. Statistics show that there are currently 608 surnames in China. According to Wang Heming, a researcher at Shanghai Library, in China Ordinary Genealogy, the surnames of China's genealogy have been difficult to count since ancient times because of the large number of deaths of genealogies. At present, there are 608 surnames in China genealogy, including 552 single surnames and 56 compound surnames. At present, 608 surnames in Family Tree cover 37 1 surnames among the hundred surnames in Song Dynasty, accounting for 84%. Among the 65 surnames handed down without genealogy in the Song Dynasty, there are 65 surnames handed down without genealogy, mainly cold surnames and rare surnames, such as Slippery, Qu, Jia, Yi, Ji, Song, Qiu, Mu, Su, Huai, Tai, E, Xian, Yin, Neng, Shuang and Shuang. According to the statistics of the fifth national census in 2000, there are 3,490 surnames in * * * in China, of which the first 100 surnames account for more than 87% of the Han population in China. Comparing the 608 surnames in the genealogy with 100 surnames, 100 surnames are all included in the genealogy. According to statistics, among 608 surnames with genealogy, Chen's genealogy is the most, reaching 2990; Followed by Zhang surname, 2597 species; Wangxing 25 12 species; Li surname 2 157 species; 2029 species of Liu surname; The genealogy of these five surnames all exceeds 2000. The surnames whose genealogy is between 100 1-2000 are: Huang, Wu, Zhou, Yang, Xu and Lin; Surnames whose genealogy ranges from 50 1 to 1000 are: Song, Hu, Zheng, Essien Cholo, Xu, Ye, He, Xie, Zhao, Xiao and Luo. The genealogy of ethnic minorities witnessed the China family, which is an indispensable part of the genealogy garden in China. The genealogy of ethnic minorities witnessed the formation of the China family. According to Wang Heming, the author of "Ordinary Genealogy of China" and a researcher of Shanghai Library, among the existing genealogies of ethnic minorities in China, Manchu has the largest number. Before writing, Mongolians spread and sang stories and legends of various heroes on the vast grassland. After Mongolian characters came into being, some oral history and heroic families were recorded, and a genealogy of characters was formed. After the establishment of the Yuan Dynasty, it followed the Jin Dynasty system and set up a big government to compile the royal family tree. However, "the lineage of the Yuan Dynasty is very secret, and its extension is unknown." Many people may not know that China's earliest participation in the World Expo was found in a family tree. According to reports, this genealogy is the genealogy of the Xu family in Beiling, Zhongshan, Guangdong. This book was compiled by Xu Run in Qing Dynasty and is now in Shanghai Library. For a long time in the past, historians believed that China people participated in the World Expo for the first time in 1855. However, according to the Xu Family Tree of Beiling, Xu Ruiheng participated in the first World Expo held in London in 185 1 and won the gold and silver prize, which is the earliest record of China people participating in the World Expo. There are 169 genealogy websites, which can be traced back to the source without leaving home. With the development and popularization of the Internet, various genealogy websites have sprung up in China. According to the statistics of China Ordinary Genealogy, as of last year, there were at least 169 genealogy websites in China. Among these genealogy websites, there are academic databases, such as Shanghai Library Genealogy Database, Anhui Library-Genealogy Resources, Hunan Genealogy Collection Center and Shanxi Library Genealogy Database. There are also comprehensive portals, such as genealogy network, Chinese surname cultural park, Chinese surname root-seeking network, people's genealogy, people's destiny, etc. More are genealogical websites run by surnames themselves, such as China Qiu's website, World Ye's genealogical website, Hu's clan network, World Wang Xungen website and Zhang's genealogical website.