The beginning of K is the Fuzhou Province medical insurance card number, social security card personnel identification number of 12, the first three are letters, the first two of the three letters indicate the province, such as Jiangsu Province, the first two are *JS*, the third letter indicates the city, generally consistent with the city's license plate number, for example, Nanjing City, Jiangsu Province, the license plate number is * Su A*, the third letter is A. The first three letters of the social security card issued by Nanjing are *JSA*, and so on in other cities.
It's a Guangdong employee social security card.