According to the postal code database, the postal code of Nan 'an City is 362300, where "36" means Fujian Province, "23" means Quanzhou City and "00" means Nan 'an City. Nan 'an, nicknamed Wu Rong, is a county-level city under the jurisdiction of Quanzhou City, Fujian Province. It is a famous hometown of overseas Chinese in southern Fujian and the main ancestral home of compatriots from Hong Kong, Macao and Taiwan.

Nan 'an has a long history. It was located in Yong 'an, Dongwu, the Three Kingdoms for three years (AD 260). It used to be the political, economic and cultural center of southern Fujian. Rich in tourism resources, there are Jiuri Mountain, Wuliqiao, Chua's old house, Zheng Chenggong Memorial Hall and other famous scenic spots.