Can I save money by using mail card? Is it safe?

Yes, it is safe. Postal union card is not only free of annual fee, but also saves money. Moreover, the card has high security and has the status of a trade union member. As the identity of the city's trade union members, the card simply means that all personal information is entered by the established bank, and after issuing the card, it can receive the trade union service information released by the bank entrusted by the Municipal Federation of Trade Unions.