World's longest family tree
The Confucius Genealogy, originally recorded by hand, was first printed in 1080 AD during the Northern Song Dynasty. Since then it has been revised only four times, during the reigns of Ming Emperor Tianqi, Qing Emperors Kangxi and Qianlong, and finally in 1937 during the Republican period. . . . According to the genealogy's chief editor Kong Dewei, the fifth edition contains over 1.3 million new entries. Living descendants have to pay five yuan (70 US cents) to be included. The dead get in for free. The 1937 edition had 600,000 entries, so the new edition contains more than two million.
Kong Deyong said that after the People's Republic of China was established in 1949 campaigns against the "Four Olds" (old customs, culture, habits and ideas) meant that people stopped talking about their family trees and considered them relics of feudalism. Since the opening-up policy began in the 1980s, the situation has changed, but many people are still reluctant to talk about the subject. This extensive article goes on to discuss details, the controversy, and new discoveries of the project.