Jiang surname is derived from the surname of Emperor Yan in ancient times. According to historical records, Jiang's surname is a descendant of Emperor Yan, and it is one of the oldest surnames in China. Shuowen said, "Shennong lives in Jiang Shui because he thinks he is a surname." The legendary Emperor Yan, namely Shennong, is said to be one of the most ancient "san huang" in the history of China. Yan Di was born in Jiang Shui (now Qishan County, Shanxi Province), so he took Jiang as his surname. Therefore, the birthplace of Emperor Yan is also the birthplace of Chiang Kai-shek. According to historical records, as early as the Spring and Autumn Period, Xirong also had a surname of Jiang, so it was called Jiang Rong, originally in Guazhou (now Dunhuang West, Gansu Province), and then gradually moved eastward. In about 638 BC, its leader moved to southern Shanxi, belonging to the State of Jin. Before the Western Han Dynasty, the Jiangs, who lived in present-day Shandong and Henan provinces, had developed into a Kanto clan (the area east of Hanguguan in Lingbao County, Henan Province). At the beginning of the Western Han Dynasty, Jiang moved from Kanto to Guanzhong, and this later generation lived in Tianshui, so the people took "Tianshui" as the county name. In the Eastern Han Dynasty, there were people who migrated to Jiangsu and Sichuan. However, until the Tang Dynasty, Tianshui was still the development and reproduction center of Jiang's family. During the Tang and Song Dynasties, Jiang's family was also distributed in Hebei, Henan, Zhejiang, Jiangxi, Anhui, Shandong and Qiongshan, Guangdong. During the Ming and Qing Dynasties, some of Jiang lived in Shanxi, Shaanxi, Hunan, Guizhou, Hubei and other places. According to Jiang's genealogy, during the Hongwu period of the Ming Dynasty, a Jiang Shiliang moved to Hongdou Village, Longxi County, Zhangzhou, Fujian Province, and made a fortune here. Its descendants multiplied, and another branch moved to Yandun Township, Lufeng, Guangdong Province, and continued to prosper and develop. Later, Jiang Shiliang 1 1 Shi Sun moved to Taiwan Province from the mainland during the Qianlong period of Qing Dynasty. Since then, people from Fujian and Guangdong have moved to Taiwan Province, and some have spread overseas.