Nan 'an is a famous hometown of overseas Chinese. Since the Tang Dynasty, many Nan 'an people have traveled overseas, covering Southeast Asia, Japan, the United States, Canada, Australia and Western European countries. By the end of 1998, overseas Chinese and compatriots from Hong Kong and Macao1460,000, and their relatives accounted for more than 80% of the county's population.

Nan 'an is one of the main ancestral homes of compatriots in Taiwan Province Province. From the beginning of Yuan Dynasty, Nan 'an people moved to Taiwan Province one after another, which was the climax of Nan 'an people moving to Taiwan Province Province from the end of Ming Dynasty to the Qing Dynasty. When Zheng Chenggong recovered Taiwan Province Province from the East, some immigrants developed in Taiwan Province. In the forty-ninth year of Qing Qianlong (1784), after the Qing government opened Lugang in Taiwan Province and Jianggang in Quanzhou, there were brothers and couples, and even the whole family moved to Taiwan Province. In 34 years of the Republic of China (1945), after Taiwan Province Province returned to the motherland, another batch of Nan 'an people moved eastward to Taiwan Province Province. By 1945, more than 2,000 people had gone to Taiwan Province Province, forming another climax of modern immigration to Taiwan Province Province. In Taiwan Province Province, there are more than 654.38+000 million Taiwan compatriots in Nan 'an, and there are hundreds of temples and shrines that Nan 'an Lu Fen has visited. Both Taipei and Tainan have Nan 'an Guild Hall, which is closely related to Nan 'an, their hometown.