Fourth. China's first surname is Li, ranking fourth among hundreds of surnames. According to statistics, there are more than 100 million people surnamed Li in the world, and the Li family is also the largest in the world. If all the people surnamed Li stand together, they can go around the earth once and a half! Li surname is not only the largest surname today, but also a big surname in ancient times. Li Er, a celebrity surnamed Li, is Laozi, a thinker in the Spring and Autumn Period, the founder of Taoism and the author of Tao Te Ching. Li Bing: During the Warring States Period, a water conservancy engineer built Dujiangyan. Li Shimin: That is, Emperor Taizong ruled the heyday of the Tang Dynasty, which is called "Zhenguan rule" in history. Li Bai: Romantic poet in Tang Dynasty. Traceability of surname: There are three sources of Li's surname: First, he comes from the won surname, and is a descendant of Zhuan Xu Di Levin, taking the official as his surname. Second, he changed the surnames of other nationalities. After Zhuge Liangping's death in the Three Kingdoms, he gave his surname to the local minority Li. Third, change the surname to Li. For example, many heroes in the Tang Dynasty were surnamed Li.