How did the social security bought in Foshan get into Yunfu's social security number?

The registered permanent residence is in Yunfu. According to the relevant information of social security cards in Guangdong Province, social security cards are divided according to the place of household registration. Because the place of household registration is Yunfu, the social security number is Yunfu. Yunfu City is located in the middle and west of Guangdong Province, south of the middle reaches of Xijiang River. Yunfu is an important node city in the Pearl River-Xijiang Economic Belt, with Guangdong-Hong Kong-Macao Greater Bay Area in the east and Beibu Gulf urban agglomeration in the west.