How to write a letter of introduction when applying for a social security card?

Letters of introduction have a fixed format. Stationery stores sell for five yuan a copy. Just fill in your name and stamp your company seal. I just bought a copy. If you want to get close, I'll give you some. I'm at Haidian Bridge. If you want to go further, you can go to the stationery store to buy one, but you really don't use it often. Our unit also handles social security, and the social security card is handled between the 25th and the end of each month. Don't miss it