What is the original password of Fujian medical insurance card?

Fujian social security card initial password:

In a secret letter, it is usually a random number.

Need to know the use of social security cards in Fujian Province:

Each provincial medical insurance participant will get a social security card, a password letter and a user manual. After receiving the social security card, the cardholder must confirm that the password letter is not damaged, keep it properly, and modify the initial password in time. If the password letter is found to be damaged, please modify the password through the counter, ATM, online banking and telephone banking of the local social security card project cooperative bank (the bank identified on the social security card) as soon as possible or apply for password reset at the local social security card project cooperative bank (the bank identified on the social security card) with my social security card and valid identity documents. The password in the password letter refers to the password of the magnetic stripe account (using invisible magnetic stripe technology)