Is the joint card of the Postal Savings Group reliable?

This is a joint debit card. It's called the Postal Savings Mission Card, which means that if you use this card on the Mission, there will be some great discounts. Postal savings card is a financial transaction card issued by the national postal department to provide financial services for depositors. Postal savings card is a postal savings card for urban and rural residents. Urban and rural residents who open a current savings account in the postal savings computer-connected post office (or postal savings outlets) may apply for a postal savings group card with their ID cards.