What should I fill in the personal serial number of Shanghai social security?

Card number of social security card. Personal serial number can only enter 0 ~ 9 digits, the first digit of serial number cannot be 0, and the maximum digit is 10. Starting year of payment: refers to the starting year of this payment (including the month of payment). The format is four-digit year plus two-digit month, such as 20 1207, which shall not be earlier than the establishment date and the first six months of the month where the application date is located.